Broken stub, maybe (4)
I believe the answer is:
'broken' is the definition.
(I've seen this before)
'stub maybe' is the wordplay.
'maybe' indicates an anagram.
'stub' anagrammed gives 'BUST'.
(Other definitions for bust that I've seen before include "Penniless" , "reduced to rubble?" , "Bosom - ruined" , "Sculpture -- ruined" , "Upper body goes bankrupt" .)