Crossword Genius

With military detachment, the doctor’s stern (5)

Ross

I believe the answer is:

draft

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'with military detachment' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'the doctor's stern' is the wordplay.
'the doctor' becomes 'dr' ('Dr' can be a synonym of 'doctor').
'stern' becomes 'aft' (similar in meaning).
'dr'+'aft'='DRAFT'

Can you help me to learn more?

(Other definitions for draft that I've seen before include "Preliminary outline" , "Written plan" , "plan outlined" , "sketch, perhaps" , "Rough drawing" .)

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