Pop or punk (5)
I believe the answer is:
music
'pop or punk' is the definition.
(I know that popular music is a music)
This is the entire clue.
(Other definitions for music that I've seen before include "Staff will support this" , "Art of instrumental performance" , "Orsino's food of love (Twelfth Night)" , "Pleasing sound" , "Audible art form ..." .)