Related Clues:
- Singer's first syllables, perhaps
- Choral section
- Jan Peerce, e.g.
- Singsong syllables
- Certain singing voices
- Bocelli's pitch
- ___ sax
- Saxophone range
- Pinkerton, in 'Madama Butterfly,' e.g.
- Bocelli, for one
- Some hers singing hymns?
- Glee club section
- Four-part harmony part
- Some choir singers
- Start of a musical refrain