Rework text of Nesbit, perhaps unfinished (4)
I believe the answer is:
edit
'rework text' is the definition.
(as in editing a piece of writing)
'nesbit perhaps unfinished' is the wordplay.
'nesbit perhaps' becomes 'Edith' (author Edith Nesbit aka E Nesbit).
'unfinished' means to remove the last letter.
'edith' with its last letter taken away is 'EDIT'.
'of' acts as a link.
(Other definitions for edit that I've seen before include "Revise - expurgate" , "Rewrite" , "Fix" , "Amend text" , "What our boss does" .)