Alright for artist to have a vegetable (4)
I believe the answer is:
Here is my best explanation:
'a vegetable' is the definition.
(okra is a kind of vegetable)
'alright for artist' is the subsidiary indication.
'alright' becomes 'ok' ('OK' can be a synonym of 'alright').
'for' says to put letters next to each other.
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'to have' is the link.
(Other definitions for okra that I've seen before include "old ladies' fingers", "Bhindi in Ind. cookery", "Long green tropical vegetable", "Vegetable", "Edible seed pods", "A vegetable", "Bhindi or lady's finger", "Lady's finger", "vegetable dish" and "Gumbo".)