Change during meditation (4)
I believe the answer is:
edit
'change' is the definition.
(edit can mean to change or alter)
'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 "Revise text" , "Make textual changes" , "Alter text" , "Revise for publication" , "Ready for publication" .)