Crossword Genius

Ancient writers made their point with it (8)

Ross

I believe the answer is:

penknife

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

'point with it' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for penknife that I've seen before include "What may be used for carving" , "A Swiss army one has several blades and many tools" , "whittling tool" , "Small pocket cutting tool" , "Handy little gadget" .)

I've seen this clue in The Irish News and The Globe and Mail.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.