Breaking Good? (8)
I believe the answer is:
smashing
I believe this clue is a double definition.
'breaking' is the first definition.
(I know that smashing is a type of breaking)
'good?' is the second definition.
(similar in meaning)
(Other definitions for smashing that I've seen before include "Great" , "use for plates at a Greek wedding?" , "Breaking violently into pieces" , "Fantastic" , "Committing act of vandalism" .)