Pressing desire to be given books (6)
I believe the answer is:
urgent
'pressing' is the definition.
(I know that pressing can be written as urgent)
'desire to be given books' is the wordplay.
'desire' becomes 'urge' (I've seen this in another clue).
'to be given' says to put letters next to each other.
'books' becomes 'NT' (New Testament).
'urge'+'nt'='URGENT'
(Other definitions for urgent that I've seen before include "Needing immediate action" , "Pressing, imperative" , "Needing early action" , "grave?" , "Requiring early action" .)