Vegetable head (4)
I believe the answer is:
bean
I believe this is a double definition.
'vegetable' is the first definition.
(bean is a kind of vegetable)
'head' is the second definition.
(bean is a kind of head)
(Other definitions for bean that I've seen before include "kept by the counter?" , "It's often baked" , "popular character with kids" , "Edible legume" , "Seed of coffee plant" .)