Annual book of facts (7)
I believe the answer is:
almanac
'annual book of facts' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for almanac that I've seen before include "Statistical annual" , "Annual containing information, Old Moore's say" , "Indicates dates" , "source of information" , "Annual publication containing information in a particular field" .)