They don't hide from the rain (7)

I believe the answer is:

showers

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'they' is the definition.
Both the answer and definition are plural nouns.
Perhaps you can see a link between them that I can't see?

I don't understand how the rest of the clue works.

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(Other definitions for showers that I've seen before include "She rows (anag.)" , "Short falls of rain" , "Washes over" , "Spots of rain" , "in April?" .)

I've seen this clue in the Evening Standard.

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