Actually one gets several holy books before a particular one (2,5)
I believe the answer is:
in truth
'actually' is the definition.
(I've seen this in another clue)
'one gets several holy books before a particular one' is the wordplay.
'one' becomes 'i' (Roman numeral).
'gets' means one lot of letters go next to another.
'several holy books' becomes 'NT' (New Testament).
'before' says to put letters next to each other.
'a particular one' becomes 'ruth' (I can't explain this - if you can you should give a lot more credence to this answer).
'i'+'nt'+'ruth'='IN TRUTH'
Can you help me to learn more?
(Other definitions for in truth that I've seen before include "As a matter of fact" , "Honestly" , "To be honest" , "Actually" , "Really" .)