Related Clues:

• Birds do it
• Dirty double-crosser
• Mouse relative
• Serenade
• Squeal on your sidekicks
• Word in a Cagney impersonation
• Chinese zodiac animal
• Experiment subject
• Word before or after ''pack''
• Do numbers
• Piper follower
• Treachery metaphor with a distinctive odor?
• Perform in an opera
• Rodent
• Pet rodent