Fighter with Fidel (3)
I believe the answer is:
che
'fighter with fidel' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for che that I've seen before include "Nickname of Ernesto Guevara" , "- Guevara, Marxist" , "First person" , "Fighter" , "-- Guevara, revolutionary" .)