Related Clues:

• Checkerboard rows, e.g.
• The kids in "Eight Is Enough," e.g.
• Group of musicians
• Set of nine voices
• Tetrad times two
• Santa's reindeer, for example
• Composition for eight voices
• Certain chamber group
• Two quartets?
• Group of nine performers
• The Mighty Mighty Bosstones, for one
• Schubert's 'Eine Kleine Trauermusik,' e.g.
• Four pairs united
• Assemblage of eight
• Big combo