Carried through and made a killing (8)
I believe the answer is:
executed
This clue could be a double definition.
'carried through' is the first definition.
'executed' can be an answer for 'carried' ('execute' can be a synonym of 'carry'). I'm not sure about the 'through' bit.
'made a killing' is the second definition.
'executed' can be an answer for 'made' (executing is a kind of making). I'm not sure about the 'a killing' bit.
'and' acts as a link.
Can you help me to learn more?
(Other definitions for executed that I've seen before include "Lawfully killed" , "Put to death as punishment" , "Produced" , "Carried out the task or put to death" , "Done (to death?)" .)