A screwy faucet? (3)

I believe the answer is:

tap

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'faucet?' is the definition.
(tap is a kind of faucet)

I can't explain the rest of the clue.

(Other definitions for tap that I've seen before include "In America, it's a spigot" , "It's called a faucet in America" , "One can be hot or cold?" , "Sort of dance" , "Hit; bug" .)

I've seen this clue in the Evening Standard.

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