Ready for publication, but opted out (3,2,3)
I believe the answer is:
put to bed
'ready for publication' is the definition.
(I've seen this before)
'but opted out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'but'+'opted'='butopted'
'butopted' with letters rearranged gives 'PUT TO BED'.
(Other definitions for put to bed that I've seen before include "finalised for printing" , "(Of newspapers) send for printing" , "ready for publication" , "(Of newspaper) send to press" .)