Gatherers hint at disaster of enormous importance (15)

I believe the answer is:

earthshattering

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'gatherers hint at disaster of enormous importance' is the definition.
I can't judge whether this defines the answer.

'gatherers hint at disaster' is the wordplay.
'disaster' is an anagram indicator.
'gatherers'+'hint'+'at'='gatherershintat'
'gatherershintat' is an anagram of 'EARTHSHATTERING'.

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(Another definition for earthshattering that I've seen is " of great importance".)

I've seen this clue in The Irish Times.

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