Answer:

gavel

Answer	Crossword Clue
GAVEL	Rapper in court
GAVEL	A chair might hold one
GAVEL	Judge's mallet

GAVEL	It helps call a meeting to order
GAVEL	It may punctuate a court order
GAVEL	Something a chair may hold
GAVEL	It may be within a judge's grasp
GAVEL	Court instrument
GAVEL	Court attention-getter
GAVEL	Signal in a courtroom
GAVEL	Auctioneer's aid