Related Clues:

• Bocelli's pitch
• ___ sax
• Saxophone range
• Pinkerton, in 'Madama Butterfly,' e.g.
• Bocelli, for one
• Four-part harmony part
• Opera singer
• General course
• Barbershop need
• Caruso, for one
• Top man in the choir?
• Cohort of 14-Across
• Pavarotti or Domingo, e.g.
• Carreras, for one
• Verdi's Otello, for one