The Collaborative International Dictionary of English v.0.48:

Clothier \Cloth"ier\, n.
   1. One who makes cloths; one who dresses or fulls cloth.
      --Hayward.
      [1913 Webster]

   2. One who sells cloth or clothes, or who makes and sells
      clothes.
      [1913 Webster]

WordNet (r) 3.0 (2006):

clothier
    n 1: a merchant who sells men's clothing [syn: clothier,
         haberdasher]