Meissen smashed in retribution (7)
I believe the answer is:
nemesis
'retribution' is the definition.
(thesaurus)
'meissen smashed' is the wordplay.
'smashed' is an anagram indicator.
'meissen' with letters rearranged gives 'NEMESIS'.
'in' acts as a link.
(Other definitions for nemesis that I've seen before include "Retributive justice" , "Unbeatable rival" , "An agent of vengeance and retribution" , "Something causing misery (or death) - Meissen (anag)" , "Goddess of retribution in Greek mythology" .)