Time's Man of the Year for 1977 (5)
I believe the answer is:
sadat
'time's man of the year for 1977' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sadat that I've seen before include "assassinated president" , "Former leader" , "Former president of Egypt" , "World leader" , "Former Egyptian president" .)