Related Clues:

• Four-part harmony part
• Opera singer
• General course
• Barbershop need
• Caruso, for one
• Top man in the choir?
• Gram or phragm lead-in
• Pavarotti or Domingo, e.g.
• Carreras, for one
• Verdi's Otello, for one
• Voice between alto and baritone
• 114-Across, e.g.
• Diego's day
• Barbershop quartet member
• Lowish voice