Related Clues:

• Ma practices it
• It has four strings
• Deep end?
• Low-voiced
• Instrument played by 7-Down in 'The Secret Life of Bees'
• Low part
• Paul Robeson, e.g.
• Woofer's output
• Low-pitched instrument
• Item with a pegbox
• Barbershop member
• Big instrument
• Sea __
• Doo-wop group anchor
• Low vocal range