Answer: cittern

AnswerCrossword Clue
CITTERNRenaissance musical instrument
citternold musical instrument related to the guitar, having a flat, pear-shaped soundbox and wire strings
citterna Renaissance stringed instrument like a guitar with a flat pear-shaped body
citterna pear-shaped guitar, also CITHER, CITHERN, CITHREN, CITOLA, CITOLE