Related Clues:

• Double-dealer
• Jailhouse singer?
• "The Wind in the Willows" fellow
• Tell Mom
• Lab animal
• Tells tales
• Kind of thief
• Betrayer
• Blow the whistle (on)
• Secretive sort
• Ben, in a film
• Name names
• Gridiron maneuver
• Be a snitch
• Lab critter