Posh partner mostly working, making gesture (6)

I believe the answer is:

beckon

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'gesture' is the definition.
(I know that beckon is a more specific form of gesture)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for beckon that I've seen before include "Make a summoning sign (to)" , "Gesture to follow" , "Gesture closer" , "Summon by sign" , "Gesture to approach" .)

I've seen this clue in The Independent.

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