Away from private duties, maybe (2,5)

I believe the answer is:

on leave

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'away' is the definition.
(I've seen this in another clue)

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

(Other definitions for on leave that I've seen before include "Having an official holiday from work" , "Officially excused from duty" , "Taking a holiday" , "Holidaying" , "Currently away from work" .)

I've seen this clue in The Irish Independent.

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