Answer:

cello

Answer	Crossword Clue
CELLO	Bull fiddle's little brother
CELLO	Chamber-music instrument
CELLO	Clear wrap, for short

CELLO	String-quartet member
CELLO	Yo-Yo Ma's instrument
CELLO	Violin's big brother
CELLO	Yo-yo Ma's instrument
CELLO	Big fiddle
CELLO	Stringed instrument in "Eleanor Rigby"
CELLO	Viola da gamba's kin
CELLO	String quartet member

CELLO	Yo-Yo's strings
CELLO	"Eleanor Rigby" instrument
CELLO	Viola's big brother
CELLO	Ma's instrument
CELLO	Rostropovich's instrument
CELLO	Casals's instrument
CELLO	Bass relative
CELLO	Piano trio member

CELLO	Ma's forte
CELLO	String ensemble instrument
CELLO	String quintet instrument
CELLO	Part of a string quartet
CELLO	Casals' instrument
CELLO	Viola's bigger cousin
CELLO	It's played with a bow
CELLO	Yo-Yo strings?

CELLO	Ma's pride and joy?
CELLO	Instrument played while seated
CELLO	Yo Yo Ma's instrument
CELLO	Casals' strings
CELLO	Violin cousin
CELLO	Its strings are tuned in perfect fifths
CELLO	Large stringed instrument
CELLO	Violin kin

CELLO	Instrument for Casals
CELLO	Stringed instrument
CELLO	Stradivari creation
CELLO	Orchestra member
CELLO	Viola relative