Related Clues:

• 'Darn it'
• Cry often made while snapping the fingers
• Squeals (with "on")
• "Curses!" to Charlie Brown
• See 24
• Apostates making Greene sad
• See danger getting involved with traitors
• First word of 'The 21 19'
• Snoopy's imprecation — vermin
• Pied Piper followers
• "Dang it!"
• Lab-maze solvers
• What Charlie Brown says when he's mad
• Laboratory maze critters
• Hamelin pests