The crossword solution for the term 'Fellow Chairperson' is 'Seatmate'. A Fellow Chairperson is a person who is appointed to a position of authority in an organization, usually as a leader or representative. The term 'Seatmate' refers to someone who shares a seat with the Fellow Chairperson, typically in a meeting or other gathering. This person may be a colleague, subordinate, or other individual who is present to support the Fellow Chairperson in their duties.