Related Clues:

• Sonata closer, maybe
• Small musical group
• Piece of chamber music
• Beaux Arts __, classical musicians for 50+ years
• Dixie Chicks, for example
• Bee Gees, e.g.
• Stooges, e.g.
• Donald's nephews, e.g.
• The Ghostbusters, e.g.
• Alvin and the Chipmunks, e.g.
• The Jonas Brothers, e.g.
• Duet + one
• Sonata part
• Wilson Phillips, for one
• Small music ensemble