Cleric

A cleric is the usual word these days for what used to be called 'a clerk in holy orders': a professional in a religion, such a a priest, a minister, a rabbi or an imam. There is also the expression 'a member of the clergy'. Both these have become more common as clerk has become predominantly used to denote jobs with less status than that of religious professionals.

However, the adjective clerical is used to describe things 'to do with religious professionals' equally with 'things to do with written records'. A 'clerical error', in particular, is akin to a 'typing mistake' or 'copying mistake'.