Indian of Peru (4)
I believe the answer is:
inca
'indian of peru' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for inca that I've seen before include "Aged Peruvian" , "One of an old race of South America" , "Ancient Peruvian like Cain" , "Ruler of an old empire centred on Cuzco" , "Pyramid builders" .)