African despot (4)
I believe the answer is:
amin
'african despot' is the definition.
(Ugandan dictator Idi Amin)
This is all the clue.
(Other definitions for amin that I've seen before include "Brutal dictator" , "Dictator Idi --" , "'Last King of Scotland'" , "'Idi ..., former Ugandan ruler (4)'" , "Idi . . . . Once ruled Uganda tyrannically" .)