Pure chaos in the country (4)
I believe the answer is:
peru
'the country' is the definition.
(Peru is an example)
'pure chaos' is the wordplay.
'chaos' indicates an anagram.
'pure' with letters rearranged gives 'PERU'.
'in' is the link.
(Other definitions for peru that I've seen before include "Country of Lima, Cuzco and Paddington Bear" , "South American state" , "Mario Vargas Llosa's native land" , "Mario Vargas Llosa's country" , "South American country" .)