Deputy, is prosecutor in contempt? (7)

I believe the answer is:

disdain

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'contempt?' is the definition.
(I know that contempt can be written as disdain)

'deputy is prosecutor in' is the wordplay.
'deputy' becomes 'd' (this could be a standard abbreviation I've not previously seen).
'prosecutor' becomes 'D.A.' (District Attorney).
'd'+'is'+'da'+'in'='DISDAIN'

Can you help me to learn more?

(Other definitions for disdain that I've seen before include "'Contempt, condescension (7)'" , "Look down on" , "Scorn - feeling of superiority" , "Contumely" , "Think (something) unworthy" .)

I've seen this clue in the Sydney Morning Herald.

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