Country song about surrounding country (7)
I believe the answer is:
romania
'country' is the definition.
(European country)
'song about surrounding country' is the wordplay.
'song' becomes 'air' (air can mean a piece of music).
'about' says the letters should be written in reverse.
'surrounding' indicates putting letters inside.
'country' becomes 'oman' (Oman is an example).
'air' back-to-front is 'ria'.
'ria' placed around 'oman' is 'ROMANIA'.
(Other definitions for romania that I've seen before include "Oman air in the eastern European state" , "East European country" , "Eastern European country" , "Country of eastern Europe" , "Balkan country" .)