Fashions clothing many mannequins (6)
I believe the answer is:
models
This clue could be a double definition.
'fashions clothing' is the first definition.
'models' can be an answer for 'fashions' (both can mean to make or shape). I am not sure about the 'clothing' bit.
'many mannequins' is the second definition.
'models' can be an answer for 'mannequins' ('model' can be a synonym of 'mannequin'). I'm unsure of the 'many' bit.
Can you help me to learn more?
(Other definitions for models that I've seen before include "Those who sit" , "Poses for artists" , "Seldom (anag)" , "Exemplars or mannequins" , "Mannequins or examplars" .)