Related Clues:

• Marian Anderson, for one
• Deep
• Mezzo's colleague
• Opera villain, typically
• Choir member
• Low woman
• Shrill
• Voice
• In three parts
• Alfredo, in 'La Traviata'
• A chorus line?
• Chorus member
• Threefold
• Barbershop quartet part
• Carreras or Caruso