Sadat's predecessor (6)
I believe the answer is:
nasser
'sadat's predecessor' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for nasser that I've seen before include "Former President of Egypt" , "Former Egypt leader" , "UAR president" , "-- Hussain, ex-cricketer" , "old Egyptian leader" .)