Resident of ancient Mexico (5)
I believe the answer is:
mayan
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">resident of ancient 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 mayan that I've seen before include "Cent. American tongue" , "Central American Indian language" , "from an ancient culture" , "of a bygone civilisation" , "Former native of Central America" .)