Victim of a 1955 coup (5)
I believe the answer is:
peron
'victim of a 1955 coup' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peron that I've seen before include "Juan ---, Argentine dictator" , "Former Argentinian leader" , "Prone to being an Argentine president" , "Surname of Evita of the musical" , "Argentinian dictator, 1946-55" .)