Fashion-show posers (6)
I believe the answer is:
models
'fashion-show posers' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for models that I've seen before include "Prototypes" , "Those who sit" , "Seldom (anag)" , "Exemplars or mannequins" , "Clothes exhibitionists for the catwalk" .)