Sumptuous drunkard (4)
I believe the answer is:
lush
This clue is a double definition.
'sumptuous' is the first definition.
(I know that sumptuous can be written as lush)
'drunkard' is the second definition.
(I know that lush is a type of drunkard)
(Other definitions for lush that I've seen before include "Succulent - heavy drinker" , "Green and growing abundantly" , "he drinks a lot!" , "Flourishing - drunkard (slang)" , "sponge" .)