Related Clues:
- Undercover agent of a sort
- One whose work is a bust
- One running in a pusher, for short
- 55-Down in a bust
- Be a rat fink
- Crack officer?
- Bluffer's giveaway
- Cop who might go undercover
- Buster of pushers
- Be a teller
- Undercover buster
- Federal drug-buster, slangily
- Drug officer, for short
- Deal breaker?
- Cop stopping traffic?