Astute, flushing it out (10)

I believe the answer is:

insightful

'astute' is the definition.
(thesaurus)

'flushing it out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'flushing'+'it'='flushingit'
'flushingit' is an anagram of 'INSIGHTFUL'.

(Another definition for insightful that I've seen is " penetrating".)

I've seen this clue in The Times.

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