They're driven home by twisters (6)

I believe the answer is:

screws

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'twisters' is the definition.
Although both the answer and definition are plural nouns, I don't see how one could define the other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for screws that I've seen before include "Prison warders (sl.)" , "Grooved fastening devices" , "increase the pressure" , "Fastening devices and prison guards, colloquially" , "Fix in place (6)" .)

I've seen this clue in the Evening Standard.

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