Related Clues:

• Horne solo
• See 1-Across
• Quarter of a quartet, maybe
• Violist's clef
• 'Summertime,' e.g., in 'Porgy and Bess'
• Countertenor
• Doo-wop part
• Chorus voice
• Pavarotti piece
• Stage solo
• Battle strain?
• Kind of horn
• Bartoli performance
• See 24-Down
• See 28-Down