Kate's cooked meat (5)
I believe the answer is:
steak
'meat' is the definition.
(steak is a kind of meat)
'kate's cooked' is the wordplay.
'cooked' is an anagram indicator (letters cooked into a new form).
'kates' with letters rearranged gives 'STEAK'.
(Other definitions for steak that I've seen before include "Good beef" , "High-quality cut of beef" , "Fleshy piece of meat" , "Cut of meat or fish" , "High quality beef" .)