High Cleric is the title conveyed upon the highest of the monks, and thus the leaders, among the Clerics of Boreth.
History and specifics[]
These wise Klingons would rise at the Boreth Monastery on the planet Boreth where they guided the Followers of Kahless on their path to duty, honour and a position among the honoured dead in Sto-Vo-Kor. (TNG episode: "Rightful Heir")