Related Clues:

• ''I ___'' (classic TV show)
• DEA worker
• One who monitors traffic
• Mole, e.g.
• Engage in espionage
• Cloak-and-dagger sort
• Snitch (on)
• Decoy to dealers
• Figure in a bust
• 007, e.g.
• Keep tabs (on)
• CIA worker
• Catcher of pushers
• Observe furtively
• Mole or plant