Sharp twist or curve (4)

I believe the answer is:

kink

This clue is a double definition.

'sharp twist' is the first definition.
(a kink is a twist or knot)

'curve' is the second definition.
(synonyms)

(Other definitions for kink that I've seen before include "Quirk; imperfection" , "Sharp bend (in a wire) - quirk" , "Eccentricity" , "Hitch" , "Quirk of behaviour" .)

I've seen this clue in The Times.

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