Stab producing blood (4)
I believe the answer is:
gore
I believe this is a double definition.
'stab' is the first definition.
(thesaurus)
'blood' is the second definition.
('gore' can be a synonym of 'blood')
'producing' is the link.
(Other definitions for gore that I've seen before include "Impale" , "Showing guts" , "Blood on a piece let into a garment?" , "Poetic blood from Al?" , "stuff from part of Kensington" .)