Celebrated with jar by the sound of it (5)
I believe the answer is:
great
'celebrated' is the definition.
(thesaurus)
'jar by the sound of it' is the wordplay.
'jar' becomes 'grate' (make unpleasant sound).
'by the sound of it' indicates a 'sounds like' (homophone) clue.
'grate' sounds like 'GREAT'.
'with' acts as a link.
(Other definitions for great that I've seen before include "and 12 Down: Powerful dog" , "Very good or very big" , "cracking" , "Of considerable size" , "Excellent (colloq.)" .)