Cleric

cleric, n., D&Dism 1. in general usage, a member of the clergy, a group ordained to perform pastoral or sacerdotal functions in a Christian church; from Late Latin clericus; c. 1621. 2. in D&D, a character class, possessing magical powers dependent on alignment considerations. 3. in fantasy gaming milieux, any character who recieves magical powers from a god or gods, as differentiated from a magic-user. [GJ1]
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Addendum: In D&D, the cleric was often a healer, and little else. This, however, made him or her the most valuable member of the party, as far as the other players were concerned.