Related Clues:

• One - mutual agreement
• Workers' association - marriage
• A single whole
• Trade union (where all agree?)
• The concordant trade union?
• Association - guild
• Joining together
• Total agreement
• Association — marriage
• All singing the same note
• State of being joined as a whole
• Coming together
• Team concept
• All together it's the child of the university
• Show of strength