Key cut (6)
I believe the answer is:
delete
This clue is a double definition.
'key' is the first definition.
(key on a computer keyboard)
'cut' is the second definition.
(I've seen this in another clue)
(Other definitions for delete that I've seen before include "Take out" , "Key" , "Remove or erase (text)" , "Remove, cross out" , "Edit out" .)