Professional women wearing coat (6)
I believe the answer is:
lawyer
'professional' is the definition.
(lawyer is a kind of professional)
'women wearing coat' is the wordplay.
'women' becomes 'w'.
'wearing' indicates putting letters inside.
'coat' becomes 'layer' (layering is a kind of coating**).
'w' put within 'layer' is 'LAWYER'.
(Other definitions for lawyer that I've seen before include "Legal representative" , "Legal practitioner" , "Solicotor or barrister" , "Attorney in the US" , "Legal adviser" .)