Related Clues:

• Sewer scurrier
• Hamelin vermin
• Tell on
• Maze scurrier
• "Wind in the Willows" character
• Treacherous one
• Unpopular singer?
• Cheese lover
• Snake in the grass, e.g.
• One not to be trusted
• Squeal on
• Gnawing critter
• Cat's prey
• Lab-maze runner
• Squealer - or squeaker