Diamonds come down to the country (7)
I believe the answer is:
iceland
'the country' is the definition.
(Iceland is an example)
'diamonds come down' is the wordplay.
'diamonds' becomes 'ice' (slang term for diamonds).
'come down' becomes 'land' (to land is to come down after flying).
'ice'+'land'='ICELAND'
'to' acts as a link.
(Other definitions for iceland that I've seen before include "Home to the volcano Eyjafjallajokull" , "Nice lad (anag)" , "North Atlantic island republic" , "Northern country" , "Althing its parliament" .)