Short novel ending with a new title (6)
I believe the answer is:
little
'short' is the definition.
(similar in meaning)
'novel ending with a new title' is the wordplay.
'ending' suggests the final letters (the letter at the end of the word).
'with' means one lot of letters go next to another.
'a new' indicates anagramming the letters.
The final letter of 'novel' is 'l'.
'title' anagrammed gives 'ittle'.
'l'+'ittle'='LITTLE'
(Other definitions for little that I've seen before include "Jobsworth?" , "'Every ...... helps" , "Small in size or amount" , "(Heroine of) Dickens novel" , "Pinkie" .)