Qatari leader (4)
I believe the answer is:
emir
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">qatari leader</span>' is the definition.<br/ ><span class="explanation-format__explanation">(Qatar is led by an emir)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for emir that I've seen before include "leader in the East" , "Local chief" , "Middle Eastern ruler" , "Eastern chieftain" , "Leading role" .)