Proof annotation (4)
I believe the answer is:
stet
'proof annotation' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for stet that I've seen before include "Ignore instruction to change" , "Let it stand (in proofing)" , "It may stand" , "Instruction to ignore amendment" , "Notation for let spelling stand, don't change it" .)