Related Clues:

• Butts
• Hollywood figure
• Investigator
• Go-between
• See 11-Down
• Emissary
• Operative
• Smart or Smiley
• 39-Across, e.g.
• Means
• Pawn
• Representative
• Check mates
• Mulder of 'The X-Files,' for one
• See 104-Down