Sounds a cold country (5)
I believe the answer is:
chile
'country' is the definition.
(Chile is a country)
'sounds a cold' is the wordplay.
'sounds' shows a homophone (sound like).
'a cold' becomes 'chilly' (I've seen this before).
'chilly' is a homophone of 'CHILE'.
(Other definitions for chile that I've seen before include "South American country" , "S. American nation" , "Country liberated by Bernardo O'Higgins" , "Long, thin country" , "Long narrow country" .)