Use a gavel (3)
I believe the answer is:
rap
'use a gavel' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rap that I've seen before include "Sharply strike; rebuke" , "African-American music, the lyrics are chanted" , "talking during musical performance" , "Criminal charge" , "Censure" .)