Ancient Peruvians (5)
I believe the answer is:
incas
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">ancient peruvians</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for incas that I've seen before include "conquered by Spain" , "People from Andes who settled in Peru" , "South Americans whose empire fell to Spain" , "Old South American royals" , "Cain's people in old Peru" .)