Roman garment (4)
I believe the answer is:
toga
'roman garment' 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 "Got a robe for an old Roman" , "One-piece Roman wrap" , "Robe for an ancient Roman" , "Roman gents' cloak" , "Outer garment" .)