Endless Burgundy in green bottles (7)
I believe the answer is:
undying
'endless' is the definition.
(thesaurus)
'burgundy in green bottles' is the wordplay.
'bottles' indicates a hidden word (bottling is a kind of containing).
'UNDYING' can be found hidden inside 'burgundy in green'.
(Other definitions for undying that I've seen before include "Lasting forever, not subject to mortality" , "Immortal, eternal" , "Inextinguishable" , "Constant" , "Everlasting" .)