Related Clues:

• Part of a road test
• Busters
• They're always looking for deals
• They may do a snow job
• Some Feds
• Snitches
• Workers with dogs, maybe
• Ones who make raids
• Traffic stoppers, of a sort
• Ringers in a ring
• Dealer busters
• DEA agents
• Truck stops?
• Car stoppers
• Pusher pursuers