Related Clues:

• Do numbers
• Piper follower
• Treachery metaphor with a distinctive odor?
• Perform in an opera
• Rodent
• Pet rodent
• Disney/Pixar's Remy, e.g.
• Tell (on)
• Be a stool pigeon
• Scumbag
• Sewer dweller
• Urban scurrier
• Nasty "Pearls Before Swine" character
• Weasel's cousin?
• 'You dirty ___!'