Crossword Genius

Green Arrow's gutted in worry (4)

Ross

I believe the answer is:

gnaw

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

'worry' is the definition.
(thesaurus)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for gnaw that I've seen before include "Chew away at" , "Eat at" , "Bite persistently, grind" , "Chew at, work with teeth" , "Chew persistently at, say a bone" .)

I've seen this clue in The Guardian.
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.