Crossword Genius

Alienate troubled sergeant (8)

Ross

I believe the answer is:

estrange

'alienate' is the definition.
('estrange' can be a synonym of 'alienate')

'troubled sergeant' is the wordplay.
'troubled' is an anagram indicator.
'sergeant' with letters rearranged gives 'ESTRANGE'.

(Other definitions for estrange that I've seen before include "disunity" , "Divorce" , "Make enemy of sergeant" , "Alien" , "Get on the wrong side of" .)

I've seen this clue in The Times.
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