Possible Clues:

• Anticlimactic occasion (... letters 2-4)
• Tempest in a teapot
• It isn't happening to be a disappointing occurrence
• Anticlimactic occasion
• Unimportant occurrence, not worth taking notice of
• Composition cleric held to be let-down
• Anti-climactic or disappointing happening
• Big whoop, sarcastically
• Big nothing
• After rejection at last, I express great disappointment?