Does one's best to include the tea-packers in the agreements (8)
I believe the answer is:
treaties
'agreements' is the definition.
(treaty is a kind of agreement)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for treaties that I've seen before include "Accords" , "Rome and Versailles, for example" , "Written agreements between states" , "Treatise on international agreements" , "Treatise about pacts" .)