From The Collaborative International Dictionary of English v.0.48 [gcide]:
Clotheshorse \Clothes"horse`\ (kl[=o]z"h[^o]rs`), n.
1. A frame to hang clothes on.
[1913 Webster]
2. a person who is conspicuous for dressing fashionably,
especially one who spends much time or money to acquire
clothing.
[PJC]
From WordNet (r) 3.0 (2006) [wn]:
clotheshorse
n 1: a framework on which to hang clothes (as for drying)
2: a man who is much concerned with his dress and appearance
[syn: dandy, dude, fop, gallant, sheik, beau,
swell, fashion plate, clotheshorse]