Where to cultivate fruit or vegetable (7)
I believe the answer is:
orchard
'where to cultivate fruit' is the definition.
'or vegetable' is the wordplay.
'vegetable' becomes 'chard' (chard is a kind of vegetable).
'or'+'chard'='ORCHARD'
(Other definitions for orchard that I've seen before include "Fruit tree plantation" , "Source of fruit" , "Enclosure containing fruit trees" , "where fruit trees grow" , "Fruit-growing area" .)