Ides of March victim (6)
I believe the answer is:
caesar
'ides of march victim' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for caesar that I've seen before include "Emperor of ancient Rome, like Julius" , "Title of the Roman emperors" , "Eg, Augustus, Julius" , "Roman dictator" , "Old Roman emperor like Julius" .)