Rot - as may cooking ingredients? (2,2,3)

I believe the answer is:

go to pot

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

I'm afraid I can't explain this answer.

(Other definitions for go to pot that I've seen before include "as stakes do" , "Deteriorate through neglect" , "Deteriorate completely - ready to be cooked?" , "Deteriorate in cooking utensil?" , "Fall into ruin" .)

I've seen this clue in The Telegraph.

Want a hint initially instead of a full solution? Install my app