Related Clues:

• DEA worker
• One who monitors traffic
• Mole, e.g.
• Engage in espionage
• Beauty spot
• Source of a leak, perhaps
• Cloak-and-dagger sort
• Snitch (on)
• Insectivorous mammal
• Decoy to dealers
• Source of a leak
• Embedded spy
• Figure in a bust
• Assembly-line setting
• 007, e.g.