Writer almost prepared to accept plagiarism (6)
I believe the answer is:
scribe
'writer' is the definition.
(scribe is a kind of writer)
'almost prepared to accept plagiarism' is the wordplay.
'almost' means to remove the last letter (most of the word but not all of it).
'prepared' becomes 'set' (I've seen this before).
'to accept' means one lot of letters goes inside another.
'plagiarism' becomes 'crib' (I've seen this in other clues).
'set' with its final letter taken away is 'se'.
'se' placed around 'crib' is 'SCRIBE'.
(Other definitions for scribe that I've seen before include "Score" , "Write" , "Scholar of Jewish law" , "7 down teacher of the Jewish Law" , "Document copier (hist.)" .)