Related Clues:

• D.C. workers
• Notices
• Moles, maybe
• G-men
• Revenuers, e.g.
• G-men and T-men, e.g.
• Moles, for example
• Smiley's people
• 007 and 99
• Seekers of intelligence?
• FBI agents
• Secretly watches
• Intelligence operatives
• Revenuers, for short
• Eliot Ness and associates