Intact Bible books found in Eire (6)
I believe the answer is:
entire
'intact' is the definition.
(I know that intact can be written as entire)
'books found in eire' is the wordplay.
'books' becomes 'NT' (abbreviation for New Testament).
'found in' means one lot of letters goes inside another.
'nt' put inside 'eire' is 'ENTIRE'.
'bible' is the link.
This may not be right. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for entire that I've seen before include "in one piece" , "Envelope" , "excluding nothing" , "Unmitigated" , "Whole; absolute" .)