Cuzco's country (4)
I believe the answer is:
peru
'cuzco's country' 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 "South American state" , "Country of Lima, Cuzco and Paddington Bear" , "Machu Picchu country" , "Mario Vargas Llosa's country" , "Nazca, Cuzco here" .)