Some bureaucrat arrested over document inaccuracies (6)
I believe the answer is:
errata
'document inaccuracies' is the definition.
(errata are printed errors)
'some bureaucrat arrested over' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'over' shows that the letters should be reversed in order.
'atarre' is hidden in the letters of 'bureaucrat arrested'.
'atarre' reversed gives 'ERRATA'.
(Other definitions for errata that I've seen before include "Publishing mistakes" , "Mistakes (Latin)" , "List of printing mistakes" , "Mistakes in printed work" , "Mistakes in printed proofs" .)