Spirit of information, that is (5)
I believe the answer is:
'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' (short for Latin 'id est', 'that is').
'of' acts as a 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" .)