Related Clues:

• "Oh, phooey!"
• 'Gosh darn it!'
• "Peanuts" exclamation
• Laboratory maze runners
• ''Peanuts'' exclamation
• Darn, old Penny gets the start of 11-across
• Experiment runners?
• Darn's kin
• Unwanted rodents
• 'Peanuts' expletive
• 'Darn it'
• "Nerts!"
• Cry often made while snapping the fingers
• Squeals (with "on")
• "Curses!" to Charlie Brown