The Collaborative International Dictionary of English v.0.48:

Finespun \Fine"spun`\, a.
   Spun so as to be fine; drawn to a fine thread; attenuated;
   hence, unsubstantial; visionary; as, finespun theories.
   [1913 Webster]

WordNet (r) 3.0 (2006):

finespun
    adj 1: developed with extreme delicacy and subtlety; "the satire
           touches with finespun ridicule every kind of human
           pretense" [syn: finespun, delicate]
    2: developed in excessively fine detail; "finespun distinctions"
       [syn: finespun, hairsplitting]

Moby Thesaurus II by Grady Ward, 1.0:

68 Moby Thesaurus words for "finespun":
   airy, attenuate, attenuated, boyish, dainty, delicate, diaphanous,
   diluted, downy, ethereal, filmy, fine, fine-drawn, fine-grained,
   flimsy, fluffy, frail, fuzzy, gauzy, girlish, gossamer, gossamery,
   gracile, hairline, hairsplitting, insubstantial, lacy, light,
   misty, nice, papery, pubescent, rare, rarefied, refined, satin,
   satiny, silky, slender, slenderish, slight, slight-made, slim,
   slimmish, slinky, small, smooth, subtle, svelte, sylphlike,
   tenuous, thin, thin-bodied, thin-set, thin-spun, thinnish,
   threadlike, vague, velutinous, velvety, wasp-waisted, watered,
   watered-down, watery, weak, willowy, wiredrawn, wispy