Golden title put on books for decoration (8)
I believe the answer is:
ornament
'decoration' is the definition.
(I've seen this before)
'golden title put on books' is the wordplay.
'golden' becomes 'or'.
'title' becomes 'name' (I've seen this before).
'put on' means one lot of letters go next to another.
'books' becomes 'nt' (New Testament).
'or'+'name'+'nt'='ORNAMENT'
'for' acts as a link.
(Other definitions for ornament that I've seen before include "small decorative object" , "Trim" , "A mark of honour" , "deck" , "Knick-knack" .)