Mark a clue that does this for golf (9)
I believe the answer is:
backslash
'mark' is the definition.
(punctuation mark)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for backslash that I've seen before include "//www.crosswordgiant.com/crossword-clue/1252911/" , "character" , "line on computer screen" , "One leaning to the left" , "Mark" .)