Possible Clues:

• Ma has a bow for it
• Part of a chamber orchestra
• Instrument played by 7-Down in 'The Secret Life of Bees'
• Part of prison circle involved in large-scale fiddle
• Place for locking up old instrument
• Item with a pegbox
• Small group attracted to old instrument
• Band with little room, at first, for large instrument
• Instrument picked up from collection
• Little room with love, one between your legs?