Abashed, wait to make good (7)
I believe the answer is:
hangdog
'abashed' is the definition.
(thesaurus)
'wait to make good' is the wordplay.
'wait' becomes 'hang'.
'to make' becomes 'do' (doing is a kind of making).
'good' becomes 'g' (abbreviation).
'hang'+'do'+'g'='HANGDOG'
(Other definitions for hangdog that I've seen before include "Ashamed (expression)" , "Downcast (expression)" , "Looking guilty" , "With a sneaking, cowed look" , "Suspend canine with shamefaced look" .)