Concise treaty (7)

I believe the answer is:

compact

I believe this clue is a double definition.

'concise' is the first definition.
(I've seen this before)

'treaty' is the second definition.
(thesaurus)

(Other definitions for compact that I've seen before include "cosmetics case" , "Neatly packed" , "Dense; formal contract" , "Compress; agreement" , "Small case for face powder" .)

I've seen this clue in The Telegraph.

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