Eat rich stews including fine vegetable (9)
I believe the answer is:
artichoke
'vegetable' is the definition.
(artichoke is a kind of vegetable)
'eat rich stews including fine' is the wordplay.
'stews' indicates an anagram.
'including' means one lot of letters goes inside another.
'fine' becomes 'ok' ('OK' can be a synonym of 'fine').
'eat'+'rich'='eatrich'
'eatrich' anagrammed gives 'artiche'.
'artiche' going around 'ok' is 'ARTICHOKE'.
(Other definitions for artichoke that I've seen before include "something often associated with Jerusalem" , "Jerusalem or globe?" , "Plant with large edible flower-head" , "something to eat" , "Food item" .)