Made Titian omit unfinished copy (9)
I believe the answer is:
imitation
'copy' is the definition.
(I know that imitation is a type of copy)
'made titian omit unfinished' is the wordplay.
'made' is an anagram indicator.
'unfinished' means to remove the last letter.
'titian'+'omit'='titianomit'
'titianomit' with its final letter removed is 'titianomi'.
'titianomi' anagrammed gives 'IMITATION'.
(Other definitions for imitation that I've seen before include "Ersatz, fake" , "Act of copying" , "take-off" , "Copy; copying" , "Forgery" .)