Raw meat treats - karate chopped! (5,7)
I believe the answer is:
steak tartare
'raw meat' is the definition.
'treats karate chopped' is the wordplay.
'chopped' indicates anagramming the letters.
'treats'+'karate'='treatskarate'
'treatskarate' anagrammed gives 'STEAK TARTARE'.
(Other definitions for steak tartare that I've seen before include "cold fish!" , "cold dish!" , "raw main" , "Dish of raw meat and eggs" , "Become proficient" .)