Doesin

13 clues
Ices
Ruins
Slays
Murders
Swindles
Finishes
Rubs out
Bumps off
Knocks off
Snuffs out
Ruins totally
Murders, in slang
Dispatches, as a dragon
Similar answers:
Aasin
Aasinapple
Aasinare
Abasing
Abbashitsingle
Abnersingleday
Abrasing
Absinth
Absinthe
Absintheminded
Abusinessaffair
Abusing
Abyssinia
Abyssinian
Abyssinianpeople
Abyssinianshare
Abyssinianshepherd
Accusing
Accusingzingers
Acdcsingerscott