Matching deal (9)
I believe the answer is:
agreement
'deal' is the definition.
(I know that deal can be written as agreement)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for agreement that I've seen before include "Compact, accord" , "Harmony of opinion" , "Conformity" , "match" , "legal contract maybe" .)