Country singer performs album, including nice introductions (5)
I believe the answer is:
'country' is the definition.
(Spain is an example)
'singer performs album including nice introductions' is the wordplay.
'introductions' says to take the initial letters (I've seen 'introduction' mean this).
The first letters of 'singer performs album including nice' is 'SPAIN'.
(Other definitions for spain that I've seen before include "Pains badly to be in the country", "EU country", "Country bordering Andorra", "part of Europe", "country of mostly dry mountains, going by air".)