Hide after dwelling in dressing gown (9)
I believe the answer is:
housecoat
'dressing gown' is the definition.
(housecoat is a kind of dressing gown)
'hide after dwelling' is the wordplay.
'hide' becomes 'coat' (an animal's coat).
'after' says to put letters next to each other.
'dwelling' becomes 'house' (I've seen this before).
'coat' after 'house' is 'HOUSECOAT'.
'in' acts as a link.
(Other definitions for housecoat that I've seen before include "Woman's informal robe" , "Informal garment" .)