Peruvian mountain range (5)
I believe the answer is:
andes
'peruvian mountain range' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for andes that I've seen before include "Mountain range in South America" , "Great mountains of western S America" , "Mounts" , "South American mountain system" , "A geographical feature" .)