Crossword Genius

Shell a silly fellow (7)

Ross

I believe the answer is:

nutcase

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

'shell' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for nutcase that I've seen before include "He's mad" , "one's cracked shell?" , "Slang for a crazy person" , "Maybe almond covering" , "One may finish in the madhouse" .)

I've seen this clue in the Sydney Morning Herald.
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.