Their news is documentary (6)

I believe the answer is:

papers

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'documentary' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for papers that I've seen before include "Documents; the press" , "ID etc." , "Documentation" , "tabloids, maybe" , "Print media" .)

I've seen this clue in the Evening Standard.

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