Lush red upended on both sides of bowling green (7)
I believe the answer is:
drinker
'lush' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'red upended on both sides of bowling green' is the wordplay.
'upended' says the letters should be written backwards (in a down clue, letters go up).
'on both sides of' indicates putting letters inside.
'bowling green' becomes 'rink' (I can't explain this - if you can you should believe this answer much more).
'red' back-to-front is 'der'.
'der' enclosing 'rink' is 'DRINKER'.
Can you help me to learn more?
(Other definitions for drinker that I've seen before include "Inebriate" , "Imbiber, toper" , "Tippler" , "Consumer of liquid, probably alcohol" .)