Related Clues:

• Narc
• Singer of a sort
• Kind of a rat
• Type of singer?
• Police informer
• Info provider
• Mafia's murder victim, often
• Informal informant
• Beans spiller
• Informer or decoy for the cops
• Singing pigeon?
• Grass that is found under seat
• His singing might result in a hit
• Singer in prison, maybe
• Police reporter?