What is forcing the rain through the shades? (7)

I believe the answer is:

wraiths

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'the shades?' is the definition.
('wraith' can be a synonym of 'shade')

I can't explain the remainder of the clue.

(Other definitions for wraiths that I've seen before include "Spectres" , "They haunt" , "spirits are made" .)

I've seen this clue in the Evening Standard.

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