Crossword Genius

Confirm aunt is at best confused (12)

Ross

I believe the answer is:

substantiate

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Here is my best explanation:

'confirm' is the definition.
('substantiate' can be a synonym of 'confirm')

'aunt is at best confused' is the wordplay.
'confused' indicates an anagram.
'aunt'+'is'+'at'+'best'='auntisatbest'
'auntisatbest' is an anagram of 'substantiate'.

Ross

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This clue was last seen in The Times

(Other definitions for substantiate that I've seen before include "Confirm", "Prove to be true" and "Prove truth of (charge)".)

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