Related Clues:

• Lab maze runner
• Untrustworthy sort
• It may be down in the dumps
• Snitch (on)
• Betray à la a snitch
• Renegade
• Nogood-nik
• Pied Piper devotee
• Melodize
• Snitcher
• Hamelin menace
• Croon a tune
• Attempt a number
• It may be studied in a lab
• Dump dweller