Music originating in the West Indies (6)
I believe the answer is:
reggae
'music originating in the west indies' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for reggae that I've seen before include "Music style from Jamaica" , "W. Indian music style" , "West Indian music with strong subsidiary beat" , "Bob Marley's music" , "Type of music developed in Jamaica in the 1960s" .)