Chieftain (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">chieftain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for emir that I've seen before include "Title of various Muslim rulers" , "Islamic ruler" , "Arabian ruler" , "Local chief" , "Arab ruler" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">chieftain</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ruler that I've seen before include "Drawing stick or monarch" , "One governing" , "Measuring strip" , "Queen, perhaps" , "that should go straight" .)