Crossword Genius

I study tip about folly (9)

Ross

I believe the answer is:

stupidity

'folly' is the definition.
('stupidity' can be a synonym of 'folly')

'i study tip about' is the wordplay.
'about' indicates an anagram.
'i'+'study'+'tip'='istudytip'
'istudytip' anagrammed gives 'STUPIDITY'.

(Other definitions for stupidity that I've seen before include "Folly" , "Lack of intelligence" , "Dull-wittedness" .)

I've seen this clue in The Mirror.
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