One-time humble pie ingredient (5)

I believe the answer is:

offal

(Other definitions for offal that I've seen before include "Liver, kidneys etc - rubbish" , "Edible liver or heart of animal" , "Waste matter" , "Putting cargo on (ship)" , "cheap meat" .)

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.