Dressing gown (8)
I believe the answer is:
peignoir
'dressing gown' is the definition.
(peignoir is a kind of dressing gown)
This is the entire clue.
(Other definitions for peignoir that I've seen before include "Woman's light dressing-gown" , "Loose dressing-gown" , "habit" , "Woman's light dressing gown" , "Woman's loose full dressing gown" .)