Fine religious book providing pieces of information (5)
I believe the answer is:
'pieces of information' is the definition.
(I've seen this before)
'fine religious book' is the wordplay.
'fine' becomes 'f' (abbreviation).
'religious book' becomes 'acts' (book of the New Testament).
'providing' acts as a link.
(Other definitions for facts that I've seen before include "Dope" , "Pieces of information" , "Certainties, verities" , "these cannot be disputed" , "Realities and certainties" .)