The Collaborative International Dictionary of English v.0.48:

Clout \Clout\ (klout), n. [AS. cl[=u]t a little cloth, piece of
   metal; cf. Sw. klut, Icel. kl[=u]tr a kerchief, or W. clwt a
   clout, Gael. clud.]
   1. A cloth; a piece of cloth or leather; a patch; a rag.
      [1913 Webster]

            His garments, nought but many ragged clouts,
            With thorns together pinned and patched was.
                                                  --Spenser.
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            A clout upon that head where late the diadem stood.
                                                  --Shak.
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   2. A swadding cloth.
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   3. A piece; a fragment. [Obs.] --Chaucer.
      [1913 Webster]

   4. The center of the butt at which archers shoot; -- probably
      once a piece of white cloth or a nail head.
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            A'must shoot nearer or he'll ne'er hit the clout.
                                                  --Shak.
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   5. An iron plate on an axletree or other wood to keep it from
      wearing; a washer.
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   6. A blow with the hand. [Low]
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   Clout nail, a kind of wrought-iron nail heaving a large
      flat head; -- used for fastening clouts to axletrees,
      plowshares, etc., also for studding timber, and for
      various purposes.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Clout \Clout\, v. t. [imp. & p. p. Clouted; p. pr. & vb. n.
   Clouting.] [OE. clutien. clouten, to patch. See Clout,
   n.]
   1. To cover with cloth, leather, or other material; to
      bandage; patch, or mend, with a clout.
      [1913 Webster]

            And old shoes and clouted upon their feet. --Josh.
                                                  ix. 5.
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            Paul, yea, and Peter, too, had more skill in . . .
            clouting an old tent than to teach lawyers.
                                                  --Latimer.
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   2. To join or patch clumsily.
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            If fond Bavius vent his clouted song. --P. Fletcher
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   3. To quard with an iron plate, as an axletree.
      [1913 Webster]

   4. To give a blow to; to strike. [Low]
      [1913 Webster]

            The . . . queen of Spain took off one of her
            chopines and clouted Olivarez about the noddle with
            it.                                   --Howell.
      [1913 Webster]

   5. To stud with nails, as a timber, or a boot sole.
      [1913 Webster]

   Clouted cream, clotted cream, i. e., cream obtained by
      warming new milk. --A. Philips.
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   Note: "Clouted brogues" in Shakespeare and "clouted shoon" in
         Milton have been understood by some to mean shoes armed
         with nails; by others, patched shoes.
         [1913 Webster]

WordNet (r) 3.0 (2006):

clout
    n 1: a target used in archery
    2: special advantage or influence; "the chairman's nephew has a
       lot of pull" [syn: pull, clout]
    3: a short nail with a flat head; used to attach sheet metal to
       wood [syn: clout nail, clout]
    4: (boxing) a blow with the fist; "I gave him a clout on his
       nose" [syn: punch, clout, poke, lick, biff, slug]
    v 1: strike hard, especially with the fist; "He clouted his
         attacker"

Moby Thesaurus II by Grady Ward, 1.0:

215 Moby Thesaurus words for "clout":
   amperage, armipotence, ascendancy, authoritativeness, authority,
   backlash, backwash, bang, bash, bat, beating, beef, belt, biff,
   black power, blow, bonk, box, brute force, buffet, cabbage, charge,
   charisma, charm, chop, clap, clip, clobber, clump, cogence,
   cogency, coldcock, collar, compulsion, consequence, control, cop,
   crack, credit, cut, dash, deal, deal a blow, deck, dig, ding, dint,
   dominance, domination, drag, drive, driving force, drub, drubbing,
   drumming, duress, effect, effectiveness, effectuality, eminence,
   enchantment, energy, esteem, favor, fetch, fetch a blow,
   flower power, force, force majeure, forcefulness, full blast,
   full force, fusillade, good feeling, heist, hit, hit a clip, hold,
   hook, impact, impellent, impelling force, impetus, importance,
   impress, impression, imprint, impulse, impulsion, in, incentive,
   incidental power, incitement, influence, influentiality,
   insinuation, irresistible force, jab, knock, knock cold,
   knock down, knock out, leadership, let have it, leverage, lick,
   magisterialness, magnetism, main force, main strength, mana, mark,
   mastery, might, might and main, mightiness, moment, momentum,
   motive power, moxie, muscle power, nail, nick, nip, paste, pelt,
   personality, persuasion, pizzazz, plunk, poke, poop, potence,
   potency, potentiality, pound, power, power pack, power structure,
   power struggle, powerfulness, predominance, preponderance,
   prepotency, pressure, prestige, print, productiveness,
   productivity, propulsion, puissance, pull, punch, purchase, push,
   rap, reaction, recoil, reflex, reign, repercussion, repute,
   response, rule, say, sinew, slam, slap, slog, slosh, slug, smack,
   smash, smite, snap, soak, sock, steal, steam, strength, strike,
   strike at, stroke, strong arm, suasion, subtle influence,
   suggestion, superiority, superpower, supremacy, swat, sway, swing,
   swipe, tattoo, thrust, thump, thwack, upper hand, validity,
   vehemence, vigor, vim, virility, virtue, virulence, vitality,
   wallop, wattage, weight, whack, wham, whip hand, whop, yerk