Endless slum in country almost making Italian scoff (9)

I believe the answer is:

spaghetti

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

'italian scoff' is the definition.
(I know that pasta are Italian)

I can't explain the rest of the clue.

(Other definitions for spaghetti that I've seen before include "Long thin pasta" , "Sort of junction" , "Past eight (anag.)" , "Strange tight peas for the Italian dish" , "stringy food" .)

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.