Answer: clapper

AnswerCrossword Clue
CLAPPERBell part
CLAPPERHousehold gadget that's a real turn-on?
CLAPPERSound-activated infomercial gadget
CLAPPERTongue of a bell.
CLAPPERIt rings a bell
clapperone that claps (the noise of striking two things together)
clapperThe free-swinging metal piece inside a bell that is made to strike the bell to produce the sound