Possible Clues:

• Crack from vicar and fool in church
• Split from extremely clever First Lady hiding fool
• Donkey joins minister in church, provoking big split
• Deep glacial crack
• Endless resource underpinning cold cleric's scissure
• Cleric appearing on donkey in church causes deep division
• Cavers abandoned first pair to search abyss
• First Lady accepts idiot supporting credit gap
• It's always cold, climbing — help not half needed when falling into it!
• Crack up in the mountains