Petitioner in Milan cat wounded (8)
I believe the answer is:
claimant
'petitioner' is the definition.
(I've seen this before)
'milan cat wounded' is the wordplay.
'wounded' indicates anagramming the letters.
'milan'+'cat'='milancat'
'milancat' is an anagram of 'CLAIMANT'.
'in' acts as a link.
(Other definitions for claimant that I've seen before include "He goes to court" , "One asking for something as a right" , "12-er" , "Litigant" , "Petitioner" .)