Slaughters (9)
I believe the answer is:
massacres
'slaughters' is the definition.
('massacre' can be a synonym of 'slaughter')
This is all the clue.
(Other definitions for massacres that I've seen before include "kills a lot" , "Atrocities" , "Indiscriminate slaughters" , "Acts of slaughter" , "Large-scale killings" .)