Crossword Genius

One needs it to understand information (12)

Ross

I believe the answer is:

intelligence

I'm a little stuck... Click here to teach me more about this clue!

'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" .)

I've seen this clue in The Globe and Mail.
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