Possible Clues:

• 'The way to greet a cleric to make him sound important? (4,6)'
• This prig - he is unfit to be a religious leader
• Head of cult, arrogant, snoops on them at first
• Cult leader on drugs quietly tries to get sorted out
• Stoned eccentric trips around Spain with leader of cult
• Caiaphas, perhaps -- strangely he is right to keep quiet
• Stoned model trips around Spain with leader of cult
• He is right to be disturbed about power for religious leader
• Important Jew -- somehow he's pi, right?
• Man in church, intoxicated, quietly making a mess of rites