The handing over of a job (10)

I believe the answer is:

assignment

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'job' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for assignment that I've seen before include "Duty to be done" , "job" , "Task or duty" , "Task, piece of work" .)

I've seen this clue in the Evening Standard.

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