Failing strategies, lacking input from good studies (9)

I believe the answer is:

treatises

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

I don't understand the rest of the clue.

Can you help me to learn more?

(Another definition for treatises that I've seen is " Formal pieces of writing".)

I've seen this clue in The Telegraph.

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