Score; cancel (7)
I believe the answer is:
scratch
I believe this clue is a double definition.
'score' is the first definition.
(both can mean to mark or etch)
'cancel' is the second definition.
(I know that cancel can be written as scratch)
(Other definitions for scratch that I've seen before include "Lacerate" , "Slight cut" , "Abraded skin areas" , "Superficial wound" , "given no advantage" .)