Adult beaten and embarrassed (7)
I believe the answer is:
abashed
'embarrassed' is the definition.
('abash' can be a synonym of 'embarrass')
'adult beaten' is the wordplay.
'adult' becomes 'a'.
'beaten' becomes 'bashed'.
'a'+'bashed'='ABASHED'
'and' acts as a link.
(Other definitions for abashed that I've seen before include "Had base (anag.)" , "'Self-conscious, embarrassed (7)'" , "Disturbed" , "Ill at ease" , "Confounded" .)