14 across: 5-across (butchery) rubbing out $1000 for credit (10)
The answer is massacring, which should account for either butchery or more likely butchery rubbing out. The rest remains unexplained.
21 across: Savage dog returns about mating period (6)
This one is so confusing that I even came up with brutal = savage, but I couldn’t bring myself to write it in because I didn’t the faintest clue as to why.