Related Clues:

• Small music ensemble
• The Brady boys or girls
• A combo
• The Three Tenors, e.g.
• Quartet after a defection
• Green Day or Cream, e.g.
• What the first words of 20-, 36-, and 54-Across lack
• Chad Mitchell ___ (1960s folk band)
• Puts bros before hos, say?
• Butcher, baker and candlestick maker
• ZZ Top, for one
• Apollo mission astronauts
• Stop and shop, e.g.
• The Police or Green Day
• ''Hay,'' ''weigh'' and ''they''