Crossword Genius

Make your mark as a non-runner? (7)

Ross

I believe the answer is:

scratch

I'm a little stuck... Click here to teach me more about this clue!

'make' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for scratch that I've seen before include "Decide not to play" , "withdraw from tournament" , "Score with a sharp object" , "Withdraw - abrasion" , "Slight cut" .)

I've seen this clue in The Globe and Mail.
Want a hint initially instead of a full solution? Install my app