Related Clues:

• Donald Duck's nephews, e.g.
• Beethoven's Opus 20, e.g.
• Four duos
• String ensemble, maybe
• Santa's reindeer, e.g.
• 'A Mighty Fortress Is Our God,' e.g.
• A chorus line?
• Dumas's musketeers, for example
• Hymn singers
• Musical work
• Vocal ensemble, maybe
• Country music's Dixie Chicks, e.g.
• Beethoven's '___ for Winds in E flat major'
• Destiny's Child, for one
• A cappella group, maybe