Killing made from large scale piece of land (8)
I believe the answer is:
massacre
'killing' is the definition.
(I know that massacre is a type of murder)
'large scale piece of land' is the wordplay.
'large scale' becomes 'mass' (I can't justify this - if you can you should give a lot more credence to this answer).
'piece of land' becomes 'acre' (I've seen this in another clue).
'mass'+'acre'='MASSACRE'
'made from' is the link.
Can you help me to learn more?
(Other definitions for massacre that I've seen before include "Wholesale slaughter" , "Complete defeat" , "Indiscriminate killing of large numbers" , "Slaughter, holocaust" , "Yours and mine" .)