Related Clues:

• Utters
• Chorus girls?
• Choir voices
• Choir section
• Lohengrin and others
• Some choristers
• Some 'Aïda' singers
• A chorus line
• Barbershop quartet members
• Don Pasquale and others
• Chorus section
• Pavarotti and Domingo
• Some clarinets
• A chorus line?
• Experts with numbers?