Typical example of Eastern religious book (7)
I believe the answer is:
epitome
'typical example' is the definition.
'eastern religious book' is the wordplay.
'eastern' becomes 'e'.
'religious' becomes 'pi'.
'book' becomes 'tome' (tome is a kind of book).
'e'+'pi'+'tome'='EPITOME'
'of' is the link.
(Other definitions for epitome that I've seen before include "Something embodying perfectly a stated quality or idea" , "Archetype, typical example" , "Ideal example" , "Exemplar - embodiment" , "Essence or embodiment" .)