Related Clues:

• Troika
• Chamber group
• Chamber piece
• Combo size, sometimes
• Set of three
• Bass, piano and sax, e.g.
• Haydn string composition
• Fates, for one
• Half a sextet
• Jazz combo
• Chamber work
• Kingston group
• Tom, Dick, and Harry for one
• Cream was one
• "Jeopardy!" contestants, e.g.