Music genre related to reggae (3)
I believe the answer is:
ska
'music genre related to reggae' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ska that I've seen before include "Jamaican music style" , "Jamaican music, forerunner of reggae" , "popular music" , "Noted genre" , "Music genre" .)