Put an end to; eradicate (7)
I believe the answer is:
abolish
I believe this is a double definition.
'put an end to' is the first definition.
(I've seen this in another clue)
'eradicate' is the second definition.
(I've seen this before)
(Other definitions for abolish that I've seen before include "Destroy" , "Scrap" , "Nullify" , "Quash" , "Put an end to (practice)" .)