Related Clues:

• Singing groups
• Some Mozart works
• Some musical groups
• Groups of eight
• Some Dixieland bands
• Some jazz combos
• Beethoven's Opus 20 and others
• Pieces of nine?
• Some chamber groups
• Sonnet starters
• Largish chamber groups
• Some musical ensembles
• Quartets doubled
• Tripled trios
• Pieces for nine