Fool gives information (4)
I believe the answer is:
dope
This clue is a double definition.
'fool' is the first definition.
(I've seen this in another clue)
'information' is the second definition.
(dope is a kind of information)
'gives' is the link.
(Other definitions for dope that I've seen before include "Aircraft fabric varnish" , "grass, perhaps" , "Drugs for a dimwit" , "But does he understand" , "Sucker" .)