Related Clues:

• Double quartet
• Church group
• Duo quadrupled
• Mississippi Mass, for one
• Heavenly voices
• The Brady Bunch, e.g.
• Eightsome
• Four pairs
• Septet plus one
• Largish chamber group
• Large combo
• Quartet doubled
• 'The Light in the Piazza' song
• Square-dance group
• School concert participant