Having wine before light show (7)
I believe the answer is:
portray
'show' is the definition.
(I've seen this before)
'having wine before light' is the wordplay.
'having wine before' becomes 'port' (I can't justify this - if you can you should believe this answer much more).
'light' becomes 'ray' (ray is a kind of light).
'port'+'ray'='PORTRAY'
(Other definitions for portray that I've seen before include "Delineate" , "Use words to describe" , "Play" , "Depict, present" , "Show" .)