Agreement in a case, we hear? (4)
I believe the answer is:
pact
'agreement' is the definition.
(pact is a kind of agreement)
'in a case we hear?' is the wordplay.
'in a case' becomes 'packed' (packed in a suitcase).
'we hear?' shows a homophone (sound like).
'packed' is a homophone of 'PACT'.
(Other definitions for pact that I've seen before include "deal" , "Settlement" , "Treaty, formal agreement" , "Written agreement between two states" , "Agreement, bargain" .)