Where Carthaginians triumphed Scots can't (6)

I believe the answer is:

cannae

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

'where carthaginians triumphed scots can't' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

This is all the clue.

Can you help me to learn more?

(Other definitions for cannae that I've seen before include "Scots are unable" , "historic battle" , "scene of old battle" .)

I've seen this clue in The Sun.

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