Related Clues:

• Xenon, for one
• The Bee Gees, e.g.
• Group
• The Fates, e.g.
• Mouth part
• The Fleetwoods, e.g., of 50's-60's pop
• It may be pitched
• See 49-Across
• Donald Duck's nephews, e.g.
• Dumas's musketeers, for example
• Musical work
• Country music's Dixie Chicks, e.g.
• Destiny's Child, for one
• The Police, e.g.
• Threesome