Spirit of information, that is (5)
I believe the answer is:
genie
'spirit' is the definition.
(I know that genie is a type of spirit)
'information that is' is the wordplay.
'information' becomes 'gen' (gen can informally mean information).
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'gen'+'ie'='GENIE'
'of' is the link.
(Other definitions for genie that I've seen before include "Obedient spirit of Arabian folklore" , "Helpful (?) spirit" , "Bottled spirit?" , "Magical servant" , "Arabian spirit as in Aladdin's lamp" .)