Book name (5)
I believe the answer is:
title
'book name' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for title that I've seen before include "established claim to ownership" , "'The name of a book, say (5)'" , "Appellation signifying status or function" , "Mr or Mrs, say" , "Form of address - name" .)