Related Clues:

• Turn informer
• No-good guy
• Deplorable sort
• Ninja Turtle mentor Splinter, e.g.
• Bean-spiller
• Alley dweller
• Disloyal one
• Snitch, slangily
• Rotten fellow
• Dirty double-crosser
• Mouse relative
• Squeal on your sidekicks
• Ruin, with ''up''
• Word in a Cagney impersonation
• Chinese zodiac animal