An unoriginal arrangement for the printer (7)
I believe the answer is:
reprint
'an unoriginal' is the definition.
I can't judge whether this definition defines the answer.
'arrangement for the printer' is the wordplay.
'arrangement for' indicates an anagram (I've seen this in other clues).
'printer' with letters rearranged gives 'REPRINT'.
Can you help me to learn more?
(Other definitions for reprint that I've seen before include "Make new edition" , "New copy of an old book" , "Publication issued again" , "Later impression of a book" , "Reissued publication" .)