Possible Clues:

• Word in many cathedral names
• Blessed, and a word that can precede the starts of 18-, 28-, 48- and 62-Across
• Last characters in church to feel godly or saintly
• Like water in the Zamzam Well
• Guacamole go-with?
• Religious alliance in turbulent age he and you'll put together
• Word before 'cow' or 'smokes'
• Ironic word before an expletive
• Godlike
• ___ water (sacred liquid)