Quechua speaker (4)
I believe the answer is:
inca
'quechua speaker' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for inca that I've seen before include "Old Peruvian people" , "Inhabitant of old Peru" , "Foreign ruler" , "Former emperor" , "Ruler of an old empire centred on Cuzco" .)