One who gives someone else the power to behave in a certain way.
One who or that which helps something to happen.
One who encourages a bad habit in another (typically drug addiction) by their behaviour.
A person acting on behalf of, or representing, another person.
In the Roman Catholic and some other churches, a cleric acting as local representative of a higher ranking member of the clergy.
In the Church of England, the priest of a parish, receiving a salary or stipend but not tithes.