Strike or scratch (6)
I believe the answer is:
delete
This clue is a double definition.
'strike' is the first definition.
(strike can mean to delete or erase)
'scratch' is the second definition.
(I know that scratch is a more specific form of delete)
(Other definitions for delete that I've seen before include "Remove, cross out" , "Strikeout, remove" , "Erase or destroy" , "Obliterate" , "Key" .)