The Collaborative International Dictionary of English v.0.48:
Clericalism \Cler"ic*al*ism\, n. An excessive devotion to the interests of the sacerdotal order; undue influence of the clergy; sacerdotalism. [1913 Webster]WordNet (r) 3.0 (2006):
clericalism n 1: a policy of supporting the influence and power of the clergy in secular or political matters