Involve in late revision (6)
I believe the answer is:
entail
'involve' is the definition.
(entail means to involve or require)
'in late revision' is the wordplay.
'revision' indicates anagramming the letters.
'in'+'late'='inlate'
'inlate' with letters rearranged gives 'ENTAIL'.
(Other definitions for entail that I've seen before include "Have as a logical consequence" , "Involve or necessitate" , "Inevitably result in" , "Inalienable estate" , "outmoded fashion" .)