Butcher's stock (4)
I believe the answer is:
meat
'butcher's stock' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for meat that I've seen before include "grub, say" , "Food for carnivores" , "Chops, steaks etc" , "17 [ESSENCE]" , "Ham, pork, chicken etc" .)