Discharge flipping drunk bishop going AWOL (5)

I believe the answer is:

demob

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'discharge' is the definition.
(I know that demob is a more specific form of the action discharge)

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for demob that I've seen before include "Leave the military" , "Return to civvy street" , "Discharge soldiers (abbr.)" , "Honourably discharge" , "Take out of action" .)

I've seen this clue in The Times.

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