Master Edward's beaten (5)
I believe the answer is:
mated
'beaten' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I don't see?
'master edward's' is the wordplay.
'master' becomes 'ma' (Master of Arts).
'edward' becomes 'ted' ().
'ma'+'ted'='MATED'
Can you help me to learn more?
(Other definitions for mated that I've seen before include "Defeated in game" , "Joined, connected" , "had sex" , "given match" .)