Colombia's neighbor (4)
I believe the answer is:
peru
'colombia's neighbor' 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 "S American country, capital Lima" , "Land of the Incas" , "Andes republic" , "South American country" , "Mario Vargas Llosa's native land" .)