Kind of pen used by scorekeepers? (9)

I believe the answer is:

ballpoint

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

'kind of pen' is the definition.

I don't understand the rest of the clue.

(Other definitions for ballpoint that I've seen before include "Type of pen" , "Biro" , "Writer" .)

I've seen this clue in The Globe and Mail.

Want a hint initially instead of a full solution? Install my app