Crossword Genius

Acute and visible sort of flu (10)

Ross

I believe the answer is:

insightful

'acute' is the definition.
(thesaurus)

'visible sort of flu' is the wordplay.
'visible' becomes 'insight' (similar in meaning).
'sort of' indicates an anagram.
'flu' anagrammed gives 'ful'.
'insight'+'ful'='INSIGHTFUL'

'and' acts as a link.

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

I've seen this clue in The Guardian.
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