Glenn Miller’s Instrument
Puzzle 12 of Ancient China Hard Pack
Question is: Glenn Miller’s Instrument
and the answer is: TROMBONE
Word Meaning:
TROMBONE — A musical instrument in the brass family, having a cylindrical bore, and usually a sliding tube (but sometimes piston valves, and rarely both). Most often refers to the tenor trombone, which is the most common type of trombone and has a fundamental tone of B♭ˌ (contra B♭).
Definitions from Wiktionary.