Roman raiment (4)
I believe the answer is:
toga
'roman raiment' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for toga that I've seen before include "Classical garment" , "Robe worn by Caesar" , "Old Roman gown" , "Roman gents' cloak" , "This ancient robe might get your goat" .)