Related Clues:

• Certain jazz combo
• Any group of nine
• Large jazz group
• Trio of trios
• Large chamber group
• Chamber work
• Trio, squared
• Largish chamber group
• Zero safety precautions, tightrope-wise
• Large combo
• Triple trio
• Nine-performer work
• Tripled trio
• Opus for nine
• Group on Miles Davis's 'Birth of the Cool,' e.g.