Vegetable taco hiker cooked (9)
I believe the answer is:
artichoke
'vegetable' is the definition.
(type of vegetable)
'taco hiker cooked' is the wordplay.
'cooked' is an anagram indicator (letters cooked into a new form).
'taco'+'hiker'='tacohiker'
'tacohiker' with letters rearranged gives 'ARTICHOKE'.
(Other definitions for artichoke that I've seen before include "Plant with large edible flower-head" , "Food item" , "Jerusalem or globe?" , "Plant with edible flower heads" , "Vegetable could give you a thicko ear" .)