The judgment of the court on the composer (7)
I believe the answer is:
verdict
'the judgment' is the definition.
(thesaurus)
'the court on the composer' is the wordplay.
'the court' becomes 'ct'.
'on' says to put letters next to each other.
'the composer' becomes 'verdi' (I've seen this before).
'ct' put after 'verdi' is 'VERDICT'.
'of' is the link.
(Other definitions for verdict that I've seen before include "stage in Trial by Jury" , "conclusion" , "Result of deliberation" , "sentence" , "where this is delivered" .)