Agreement in case (7)
I believe the answer is:
compact
This clue is a double definition.
'agreement' is the first definition.
(compact is a kind of agreement)
'case' is the second definition.
(compact is a kind of case)
'in' is the link.
(Other definitions for compact that I've seen before include "Little" , "Make denser, agreement" , "An official agreement" , "woman's case" , "cosmetics case" .)