Possible Clues:

• Recall missing engineers given transport union's request of workers
• Remains after Frenchman goes to joint - because of this one has a sense of belonging
• Politician's joint associates
• Leg's joint, as state of belonging
• Those belonging to a club
• The state of one's belongings
• Associate post allows one to go clubbing perhaps
• What a joiner gets in limbs and joint
• Perhaps a vessel is as one in sociery
• For everybody in organisation, it is fashionable to be under arms