Related Clues:

• Author's negotiator
• FBI worker
• Contract bridge?
• G-man, e.g.
• 007, e.g.
• FBI guy, e.g.
• CIA worker
• Talent broker
• Insurance broker
• Paid go-between
• Fed, e.g.
• Smiley, for one: Abbr.
• Taker of ten pct.
• Actor's negotiator: Abbr.
• Booker, at times