Removed part of chapter as editor (6)
I believe the answer is:
erased
'removed' is the definition.
(to erase is to remove or delete)
'part of chapter as editor' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'ERASED' is hidden in the letters of 'chapter as editor'.
(Other definitions for erased that I've seen before include "deleted material" , "Obliterated" , "'Wiped out, deleted (6)'" , "Red sea (anag)" , "Removed completely" .)