Related Clues:

• Kingston group
• Tom, Dick, and Harry for one
• Schubert's "Grand ___"
• Like 20-Across
• Cream was one
• Two-some
• "Jeopardy!" contestants, e.g.
• Sextet X .5
• Half of 7-Down
• "Jeopardy!" contestants, collectively
• Jazz group, often
• The Fleetwoods, for example
• Singing group
• ZZ Top, musically
• The White Stripes, e.g.