Prohibition includes English vegetable (4)
I believe the answer is:
bean
'vegetable' is the definition.
(bean is a kind of vegetable)
'prohibition includes english' is the wordplay.
'prohibition' becomes 'ban' (ban is a kind of prohibition).
'includes' indicates putting letters inside.
'english' becomes 'e' (abbreviation).
'ban' placed around 'e' is 'BEAN'.
(Other definitions for bean that I've seen before include "Seed of e.g. coffee" , "Kidney-shaped seed as for coffee" , "It's often baked" , "Seed; head" , "Vegetable; head" .)