Biblical occupation? (3)

I believe the answer is:

job

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'occupation?' is the definition.
(I know that occupation can be written as job)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for job that I've seen before include "'Task, chore (3)'" , "Book; task" , "Task; paid position" , "Patient man; task" , "Post" .)

I've seen this clue in The Irish Independent.

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