Table vegetable containing gum (6)
I believe the answer is:
legume
'table' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'vegetable containing gum' is the wordplay.
'vegetable' becomes 'lee' (I am not sure about this - if you are sure you should believe this answer much more).
'containing' indicates putting letters inside.
'lee' placed around 'gum' is 'LEGUME'.
Can you help me to learn more?
(Other definitions for legume that I've seen before include "Bean or pea, for example" , "Pea or bean pod" , "A vegetable for e.g. mule" , "Plant that bears its seeds in a pod" , "Bean, pea etc" .)