Butcher's ex-partner disposes of veal finally (4-4)
I believe the answer is:
once-over
'butcher's' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
I don't understand how the remainder of the clue works.
(Other definitions for once-over that I've seen before include "Brief check" , "Quick examination" , "Rapid inspection" , "Appraising glance" , "Cursory examination" .)