Related Clues:

• Look in (on)
• Ten-percenter
• Le Carré staple
• Watch secretly
• Finder of secrets
• Mole, maybe
• One might get a cut
• One getting a cut
• Acting ambassador?
• See 41-Across
• Bug someone, e.g.
• Catch a glimpse of
• Stratego piece
• Middleman
• Maxwell Smart, for one