One needs it to understand information (12)
I believe the answer is:
intelligence
'information' is the definition.
(I know that intelligence is a type of information)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for intelligence that I've seen before include "Ken" , "Brains -- news" , "Covert information" , "Spy reports" , "Mind; news" .)