Related Clues:

• Domingo and others
• Choir males
• Domingo et al.
• Crosby and Sinatra, for example
• Famed operatic trio
• Pavarotti, Domingo and Carreras
• Low parts
• Singing voices in the 17-Across
• Low-key performers?
• Vocalists
• Male singers from Reston
• Male voices
• Male singers with high register
• Male singing voices
• Forbid it with the singles that are lighter then Bass