Related Clues:

• Pieces of music being performed in practice sessions
• Oxygen's protons, neutrons and electrons
• I sort out threesomes
• Sets of three
• The nights of Hanukkah and the legs on a spider, for two
• Compositions for nine
• Three-person bands
• Small musical groups
• Musketeers and blind mice
• The band fun. and others
• Some Mozart movements
• Musical pieces requiring no practice for players
• Performing threesomes
• The Police & Nirvana, e.g
• ELP & The Police, e.g