Related Clues:

• Untrustworthy sort
• It may be down in the dumps
• Snitch (on)
• Renegade
• Nogood-nik
• Pied Piper devotee
• Snitcher
• Hamelin menace
• It may be studied in a lab
• Dump dweller
• Word before or after "pack"
• Pied Piper target
• See 30-Down
• Destructive rodent
• Tattle (on)