Hip hop (3)
I believe the answer is:
rap
'hip hop' is the definition.
(I know that hip hop can be written as rap)
This is all the clue.
(Other definitions for rap that I've seen before include "Short quick tap" , "Sharply strike; rebuke" , "Knock loudly" , "Administer sharp blow, being below par" , "Knock for par" .)