Cockney's announced right good look at biased information (10)
I believe the answer is:
propaganda
'information' is the definition.
(I know that propaganda is a type of information)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for propaganda that I've seen before include "publicity material" , "Indoctrination" , "Goebbels' responsibility" , "Politically biased information" , "Hype" .)