Neighbor of Bolivia (4)
I believe the answer is:
'neighbor of bolivia' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for peru that I've seen before include "Mario Vargas Llosa's country" , "Country of Lima, Cuzco and Paddington Bear" , "Paddington Bear's country of birth" , "Land of the Incas" , "South American republic" .)