Related Clues:

• Two-timing rodents?
• 'Oh, nuts!'
• Laboratory maze navigators
• Charlie Brown's "Darn it!"
• Lower level of hell?
• Some rodents
• Proverbial sinking ship deserters
• "What the __!"
• Shoot!"
• Hamelin headache
• Brown expletive
• Rodents
• Treacherous rodents
• What a nuisance that they shine back
• Might they gnaw their way back for the main part?