Embargo involving English vegetable (4)
I believe the answer is:
bean
'vegetable' is the definition.
(bean is a kind of vegetable)
'embargo involving english' is the wordplay.
'embargo' becomes 'ban' (I've seen this in another clue).
'involving' indicates putting letters inside.
'english' becomes 'e' (abbreviation).
'ban' enclosing 'e' is 'BEAN'.
(Other definitions for bean that I've seen before include "kept by the counter?" , "Vegetable; coffee seed" , "Seed; head" , "Haricot or runner?" , "Edible seed" .)