Machu Picchu resident (4)
I believe the answer is:
inca
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">machu picchu resident</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 inca that I've seen before include "Ruler of an old empire centred on Cuzco" , "An old Peruvian like Cain" , "Ancient Andean Indian" , "South American (historical)" , "Member of old South American Indian people of Peru" .)