Complaint before Kate's strange cut (9)
I believe the answer is:
beefsteak
'cut' is the definition.
(beefsteak is a kind of cut)
'complaint before kate's strange' is the wordplay.
'complaint' becomes 'beef' (beef can mean a complaint or objection).
'before' means one lot of letters go next to another.
'strange' is an anagram indicator.
'kates' anagrammed gives 'steak'.
'beef'+'steak'='BEEFSTEAK'
(Other definitions for beefsteak that I've seen before include "Thick lean slice of meat for grilling or frying" , "Porterhouse, sirloin, or T-bone, for example" , "Thick cut of meat" , "something to be eaten" , "used for club" .)