Metal Percussion Disk
Puzzle 20 of Groups of Three Easy Pack
Question is: Metal Percussion Disk
and the answer is: CYMBAL
Word Meaning:
CYMBAL — (music) A concave plate of metal, usually brass or bronze, that produces a sharp, ringing sound when struck: played either in pairs, by striking them together, or singly by striking with a drumstick or the like.
Definitions from Wiktionary.