Related Clues:

• Many choirboys
• Alternative to humming?
• Opera's hero, often
• General meaning
• Bocelli's range
• Choral components
• Kind of saxophone
• Tamino in 'The Magic Flute,' e.g.
• Barbershop member
• "Danny Boy" singer, often
• One of a singing trio
• Pavarotti was one
• Chorus line
• Course of thought
• Baritone's little brother