Related Clues:

• Be a tattle
• Buster of a pusher
• Drug agent, for short
• His work is a bust
• Antidrug agent
• One might work with dogs
• One awaiting a shipment, maybe
• Bluffer's undoing, in poker
• Snitch .
• Undercover drug agent
• "Traffic" cop
• Show and ___
• Giveaway at the poker table
• "The William ___ Overture"
• Druggie buster