Revise during meditation (4)
I believe the answer is:
edit
'revise' is the definition.
(I've seen this before)
'during meditation' is the wordplay.
'during' says the answer is hidden in the clue.
'EDIT' can be found hidden inside 'meditation'.
(Other definitions for edit that I've seen before include "Manage a newspaper" , "Check text for publication" , "Amend a publication" , "Literally, arrange" , "Be in charge (of paper)" .)