Answer: violoncello

AnswerCrossword Clue
VIOLONCELLOSolo instrument for which six Bach suites were written
VIOLONCELLOVictor Herbert's instrument.
VIOLONCELLOPiatigorsky's instrument.
VIOLONCELLOPart of a trio.
violoncello(Italian) a musical instrument, aka cello