Independent chieftain (4)
I believe the answer is:
emir
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">independent chieftain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for emir that I've seen before include "Eastern ruler in mire" , "Arabic ruler" , "Islamic chieftain" , "Top man" , "Islamic title" .)