Crossword Genius

If foreign, is French (6)

Ross

I believe the answer is:

legion

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

But I can't explain it at all! Could you help me understand?

(Other definitions for legion that I've seen before include "Division of ancient Roman army" , "A great number in the Roman military unit" , "Roman battalion" , "Host" , "Roman military body of men" .)

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