Disinformation demanding serious look, do we hear? (10)

I believe the answer is:

propaganda

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

'disinformation' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for propaganda that I've seen before include "PR" , "Dissemination of information" , "messages" , "publicity material" , "'Spin'" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app