Related Clues:

• Two pieces of pizza?
• Sleep, so to speak
• Couple of pizzas?
• Jazz duo?
• Sleep indicators
• Jazz duet?
• Encyclopedia's end
• Scrabble 10-pointers
• Puzzle center?
• Zuider and others
• They follow exes and wyes
• Things to catch
• They're generally caught at night
• Letters symbolizing sleep
• Sleep, symbolically