Anything related to office work is called clerical, especially the more menial and boring jobs such as filing and administration. You might say "The Office" is a clerical comedy.
In older times clerical had an additional common meaning of referring to anything to do with the clergy — those ordained for religious work, usually in the Christian faith. Clerical comes from the old Latin term clericus, meaning a "churchman," from which cleric later came, meaning a priest or religious leader. To have "a clerical air" means to be clearly identifiable either as an ink-stained office wretch or a member of the cloth.