Luxuriant and alcoholic (4)
I believe the answer is:
lush
This clue is a double definition.
'luxuriant' is the first definition.
(I know that luxuriant can be written as lush)
'alcoholic' is the second definition.
(I know that alcoholic can be written as lush)
'and' acts as a link.
(Other definitions for lush that I've seen before include "Prolific" , "Growing thickly; succulent" , "Rich and juicy" , "Of grass, growing thick and strong" , "Of growth, profuse and abundant" .)