Related Clues:
- Los __: city near San Jose
- Soloists in Mahler's Symphony #3
- School singing group
- Treble clef singers
- Some glee clubbers
- Vocalists
- Male singers
- Male singers from Reston
- Lowest female singing voices
- Male voices
- Male singers with high register
- Male singing voices
- They sound high enough for getting on for a dozen alternatives, perhaps (6)
- What sound like notes hit the high notes
- Perhaps invoices with a slot