Snowdrops? (10)

I believe the answer is:

avalanches

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'snowdrops?' is the definition.
Although both the answer and definition are plural nouns, I don't see how they can define each other.

This is the entire clue.

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(Another definition for avalanches that I've seen is " Unstoppable destroyers".)

I've seen this clue in The Globe and Mail.

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