Finding of court in support of composer (7)
I believe the answer is:
verdict
'finding' is the definition.
(verdict is a kind of finding)
'court in support of composer' is the wordplay.
'court' becomes 'ct'.
'in support of' means one lot of letters go next to another (I've seen this in other clues).
'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 "Legal finding" , "sentence" , "Jury's decision" , "stage in Trial by Jury" , "Could be innocent or guilty" .)