Facts, knowledge (4)
I believe the answer is:
info
This clue is a double definition.
'facts' is the first definition.
(I've seen this in another clue)
'knowledge' is the second definition.
(short for information)
(Other definitions for info that I've seen before include "Knowledge provided" , "Intelligence (abbr)" , "counsel?" , "Dope" , "Facts (abbr)" .)