What’s left after shelling? Nuts! (6)

I believe the answer is:

shucks

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

'nuts' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot understand how one could define the other.

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for shucks that I've seen before include "result of shelling?" , "Something of little value - pea pods" , ""Aw ____" (American exclamation)" , "Gosh" , "I regret" .)

I've seen this clue in The Times.

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.