Wanton hassles me disgracefully (9)
I believe the answer is:
shameless
'wanton' is the definition.
(thesaurus)
'hassles me disgracefully' is the wordplay.
'disgracefully' indicates an anagram.
'hassles'+'me'='hasslesme'
'hasslesme' with letters rearranged gives 'SHAMELESS'.
(Other definitions for shameless that I've seen before include "Barefaced, unabashed" , "Quite brazen" , "Brazenly showing no regret" , "Immodest; brazen" .)