Mideast leader (4)
I believe the answer is:
emir
'mideast leader' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for emir that I've seen before include "Middle-Eastern ruler" , "Eastern title" , "Ruler or chieftain in Arabia" , "Ruler in the Middle East and mire" , "Local chief" .)