Correct conclusion about this writer (5)
I believe the answer is:
emend
'correct' is the definition.
(thesaurus)
'conclusion about this writer' is the wordplay.
'conclusion' becomes 'end' (end is a kind of conclusion).
'about' means one lot of letters goes inside another.
'this writer' becomes 'me' (the person who is writing these clues).
'end' placed around 'me' is 'EMEND'.
(Other definitions for emend that I've seen before include "Improve by altering" , "Improve by editing" , "Edit; make alterations to a draft" , "Modify" , "do editorial work" .)