Garment in ancient Rome (4)
I believe the answer is:
toga
'garment in ancient rome' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for toga that I've seen before include "Roman gents' cloak" , "Old-style dress" , "Classical garment" , "Roman male garb" , "This ancient robe might get your goat" .)