Posers seldom troubled (6)
I believe the answer is:
models
'posers' is the definition.
('model' can be a synonym of 'poser')
'seldom troubled' is the wordplay.
'troubled' indicates anagramming the letters.
'seldom' is an anagram of 'MODELS'.
(Other definitions for models that I've seen before include "Prototypes" , "Seldom (anag)" , "Poses for artists" , "Exemplars or mannequins" , "Clothes exhibitionists for the catwalk" .)