Vegetable item, well-worn stuff served with some bread (7)
I believe the answer is:
corncob
'vegetable item' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'well-worn stuff served with some bread' is the wordplay.
'well worn stuff' becomes 'corn' (I can't justify this - if you can you should believe this answer much more).
'served with' means one lot of letters go next to another.
'some bread' becomes 'cob' (I've seen this before).
'corn'+'cob'='CORNCOB'
Can you help me to learn more?
(Other definitions for corncob that I've seen before include "Source of a yellow vegetable" , "Smoked" , "Middle of ear" , "Central part of the maize ear" , "Head of maize" .)