Crossword Genius

Fine intelligence associated with Prince Charlie (7)

Ross

I believe the answer is:

halfwit

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 halfwit that I've seen before include "One only 50% all there?" , "Being stupid" , "dunce?" , "Charlie?" , "Mug" .)

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