Country song fellows interrupt (7)
I believe the answer is:
armenia
'country' is the definition.
(Armenia is a country)
'song fellows interrupt' is the wordplay.
'song' becomes 'aria' (piece of music in an opera).
'fellows' becomes 'men' (fellow can mean a man).
'interrupt' is an insertion indicator.
'aria' going around 'men' is 'ARMENIA'.
(Other definitions for armenia that I've seen before include "Former Soviet republic of south-east Europe, capital Yerevan" , "Landlocked country of southwest Asia" , "Country in the Caucasus, capital Yerevan" , "Republic, formerly part of the Soviet Union" , "South-west Asian country, capital Yerevan" .)