Garment for women in mind (5)
I believe the answer is:
brain
'mind' is the definition.
(synonyms)
'garment for women in' is the wordplay.
'garment for women' becomes 'bra' (underwear worn by women).
'bra'+'in'='BRAIN'
(Other definitions for brain that I've seen before include "Intellectual ability" , "Intelligent person" , "Mind" , "Clever person" , "Mastermind" .)