Ended with ace food (5)
I believe the answer is:
pasta
'food' is the definition.
(pasta is a kind of food)
'ended with ace' is the wordplay.
'ended' becomes 'past' (I've seen this before).
'with' means one lot of letters go next to another.
'ace' becomes 'a'.
'past'+'a'='PASTA'
(Other definitions for pasta that I've seen before include "dish high in carbohydrates" , "Flour and water foodstuff" , "Processed flour dough" , "Italian dough" , "Eg, spaghetti" .)