Related Clues:

• The Dixie Chicks and the Dixie Cups
• Musical chords
• Sextet halves
• Backup groups, often
• The Supremes and others
• Basics in chording
• Some folk groups
• Small chamber groups
• Some chamber music groups
• Tuneful threesomes
• Some Beethoven works
• The Ghostbusters and the Police
• Groups of sets of three
• Chinese secret societies
• Sets of threes