Crossword Genius

Information in folio book (5)

Ross

I believe the answer is:

facts

'information' is the definition.
(I've seen this before)

'folio book' is the wordplay.
'folio' becomes 'f' (abbreviation listed in Chambers).
'book' becomes 'acts' (book of the Bible).
'f'+'acts'='FACTS'

'in' is the link.

(Other definitions for facts that I've seen before include "these cannot be disputed" , "hard information" , "Truths" , "Pieces of information" , "Realities and certainties" .)

I've seen this clue in The Independent.
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