Related Clues:

• Lab dwellers
• Sewer rodents
• Charlie Brown's "Darn!"
• Candidates for witness protection programs
• Traitors
• Unwanted tenants
• Urban vermin
• "Dagnabbit!"
• "Doggone!"
• ''Peanuts'' expletive
• Charlie Brown's expletive
• "Dagnabit!"
• Slum vermin
• Mrs. Frisby's charges in 'The Secret of NIMH'
• Dwellers in 17-Across