Offensive elegies a bard composed (12)
I believe the answer is:
disagreeable
'offensive' is the definition.
(thesaurus)
'elegies a bard composed' is the wordplay.
'composed' indicates an anagram.
'elegies'+'a'+'bard'='elegiesabard'
'elegiesabard' with letters rearranged gives 'DISAGREEABLE'.
(Other definitions for disagreeable that I've seen before include "Offensive - peevish" , "Bad-tempered" , "Obnoxious" , "Unpleasant" .)