PC still to admit superior officer's correct to go to press? (4-4)
I believe the answer is:
copy-edit
'pc still to admit superior' is the definition.
I can't judge whether this definition defines the answer.
'officer's correct to go to press?' is the wordplay.
'officer' becomes 'co' (Commanding Officer abbreviation).
'correct' becomes 'edit' (edit can mean to correct or emend).
'to go to' means one lot of letters go next to another.
'press?' becomes 'py' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'edit' put after 'py' is 'pyedit'.
'co'+'pyedit'='COPY-EDIT'
Can you help me to learn more?
(Other definitions for copy-edit that I've seen before include "check text for errors?" , "Prepare for printing" , "Check (text) for accuracy" .)