A movement regarded with contempt? (4)

I believe the answer is:

jerk

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'a movement' is the definition.
(jerk is a kind of movement)

I don't understand the remainder of the clue.

(Other definitions for jerk that I've seen before include "Yank; preserve (beef)" , "fool" , "Twitch" , "kind of lift in competition" , "preserved beef" .)

I've seen this clue in the Evening Standard.

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