Shot boar with it at slaughterhouse (8)
I believe the answer is:
abattoir
'slaughterhouse' is the definition.
('abattoir' can be a synonym of 'slaughterhouse')
'shot boar with it at' is the wordplay.
'shot' indicates anagramming the letters.
'with' says to put letters next to each other.
'boar'+'it'+'at'='boaritat'
'boaritat' anagrammed gives 'ABATTOIR'.
(Other definitions for abattoir that I've seen before include "Building used for butchery" , "Building for butchering animals" , "it makes a killing" , "[EASY MEAT] half-cut seen here?" , "I tar boat (anag)" .)