Estrange drunken military sort (8)

I believe the answer is:

sergeant

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'military sort' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'estrange drunken' is the wordplay.
'drunken' indicates an anagram.
'estrange' with letters rearranged gives 'SERGEANT'.

Can you help me to learn more?

(Other definitions for sergeant that I've seen before include "Pepper, say" , "Military or police officer" , "CARRY ON FILM" , "Reagents (anag)" , "Troy" .)

I've seen this clue in The Sun.

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