Only a fool gives information (4)

I believe the answer is:

dope

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'information' is the definition.
(I know that dope is a type of details)

I can't explain the remainder of the clue.

(Other definitions for dope that I've seen before include "Informally, drug or silly person" , "Illegal drug; idiot" , "Marijuana - fool" , "Idiot; information" , "Informal drug or stupid person" .)

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

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