Related Clues:

• Envoy, e.g.
• Worker at the United Nations
• An ambassador or tactful person
• Tactful person, maybe in public service
• Tactful person, may work in embassy
• Official engaged in international negotiations
• One deals tactfully with others
• To be tactful, Matthew, get your head well down, by the sound of it
• Official representing a country abroad
• 'Watch With Mother' interrupts bath-time negotiator
• Envoy gets certificate on time
• Certificate given to the top arbitrator
• Award given to the top negotiator
• Embassy bigwig
• Very tactful person