Gentle blow (3)
I believe the answer is:
rap
'gentle blow' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rap that I've seen before include "Form of music with spoken lyrics" , "Hit - "songs" by Snoop Dogg and Jay-Z, say" , "Form of music with chanted rhyming lyrics" , "Sharply strike; rebuke" , "Smack (knuckles)" .)