Aztec emperor (9)
I believe the answer is:
montezuma
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">aztec emperor</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for montezuma that I've seen before include "Aztec emperor (who takes his revenge on tourists?)" , "Aztec king, has his Revenge" , "Aztec "revenge" ruler" , "Last Aztec emperor (who now has his revenge!)" , "Last ruler in 16th century of the Aztec empire" .)