Terry garment (4)
I believe the answer is:
robe
'terry garment' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for robe that I've seen before include "Gown or dress of office" , "Formal gown" , "official dress" , "Long loose garment or dressing gown" , "Clobber" .)