Related Clues:

• Cheese lover
• Snake in the grass, e.g.
• Jailhouse fink
• One not to be trusted
• Squeal on
• Gnawing critter
• Cat's prey
• DEA agent, e.g.
• Lab-maze runner
• Dealer's bane
• Fuzz buster?
• Squealer - or squeaker
• Drug-fighting cop
• Grass
• Hardly a good friend