Caribbean music genre (4)
'caribbean music genre' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for calypso that I've seen before include "Slay cop with a West Indian song" , "W. Indian ballad" , "West Indian music - nymph who kept Odysseus on her island" , "W.Indian ballad dealing with topical events" , "West Indian ballad - Homerian sea nymph" .)
(Another definition for soca that I've seen is " Pounding dance music".)