Pre-Columbian Peruvian (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pre-columbian peruvian</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 "Ancient Peruvian like Cain" , "South American (historical)" , "mountain dweller" , "Old Peruvian descended from Cain" , "Aged Peruvian" .)