Related Clues:

• "Macbeth" witches, e.g
• Small group involved in riot
• The Dixie Chicks, for one
• Rock's Cream was one
• Three-piece
• Piece of music -- turn it on, oddly
• Country's Rascal Flatts, e.g
• Rock's ZZ Top, for one
• The Dixie Chicks, e.g
• What's altered at the beginning of the next composition
• Donald Duck's nephews, e.g
• Rock's Cream, for one
• (Composition for) three performers
• Singing threesome
• Some backing from the choir trebles for a small group