Rocksteady precursor (3)

I believe the answer is:

ska

'rocksteady precursor' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for ska that I've seen before include "Noted genre" , "Jamaican music, forerunner of reggae" , "Jamaican music style" , "Music genre" , "popular music" .)

I've seen this clue in The A.V Club, the Jonesin', the Ink Well xwords and the Wall Street Journal.

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