Anything but widespread agreement (7)
I believe the answer is:
compact
'agreement' is the definition.
(compact can mean an agreement)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for compact that I've seen before include "cosmetics case" , "Dense; formal contract" , "The powder-box is closely packed" , "Dense; treaty" , "An official agreement" .)