Crossword Genius

In study I messed up division (8)

Ross

I believe the answer is:

disunity

'division' is the definition.
(thesaurus)

'in study i messed up' is the wordplay.
'messed up' is an anagram indicator.
'in'+'study'+'i'='instudyi'
'instudyi' anagrammed gives 'DISUNITY'.

(Other definitions for disunity that I've seen before include "conflict" , "Lack of solidarity" , "Lack of oneness" , "Lack of agreement" .)

I've seen this clue in The Times and The Sun.
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