Inclination to live with books (4)
I believe the answer is:
bent
'inclination' is the definition.
(bent is a kind of inclination)
'live with books' is the wordplay.
'live' becomes 'be' (synonyms).
'with' means one lot of letters go next to another.
'books' becomes 'nt' (New Testament).
'be'+'nt'='BENT'
'to' acts as a link.
(Other definitions for bent that I've seen before include "Distorted" , "Morally crooked" , "Deformed" , "Personal inclination" , "on the fiddle" .)