Possible Clues:

• Fired, man becomes flexible
• Line I added to article, showing flexibility
• Nimble, like a gymnast
• Slim, graceful
• Not the big stiff that set fire to him
• Slick enough to have set him on fire, perhaps
• Agile and casual, but not to begin with
• Gymnastically supple
• Tipsy ambassador's anything but stiff
• Happy to manage without leader, being flexible