Related Clues:

• Hymn renderers
• Trios times two
• Literary gables and others
• The Dixie Chicks and others
• Groups of seven
• Groups on risers
• Doubled trios
• Classical-music movements
• Six-legged bands
• The Dixie Chicks and the Dixie Cups
• The Pleiades, et al.
• Sextet halves
• Backup groups, often
• The Supremes and others
• Seven-player pieces