Conqueror of Mexico (6)
I believe the answer is:
cortes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">conqueror of mexico</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 cortes that I've seen before include "Spanish conquistador, d.1547" , "Conquering Spaniard" , "Spanish parliament, sector (anag.)" , "Spanish conquistador who overthrew the Aztec emperor Montezuma, d. 1547" .)