Cook’s last to assess meat, after a strike by one of the hands (6,4)

I believe the answer is:
karate chop
'a strike by one of the hands' is the definition.
I know nothing about this answer so I can't tell whether this works.
'cook's last to assess meat' is the wordplay.
'cook's last' becomes 'ka' (I can't justify this - if you can you should give a lot more credence to this answer).
'to assess' becomes 'rate' (rating is a kind of assessing).
'meat' becomes 'chop' (chop is a kind of meat).
'ka'+'rate'+'chop'='KARATE CHOP'
'after' is the link.
Can you help me to learn more?
(Other definitions for karate chop that I've seen before include "strike from Japan" , "Hit with the side of the hand" .)
