Champagne (6)
'champagne' is the definition.
(synonyms)
This is all the clue.
(Other definitions for bubbly that I've seen before include "Champers" , "Effervescent" , "Champagne (colloq.)" , "Vivacious; champagne" , "Drink" .)
'champagne?' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for fizz that I've seen before include "Effervescent drink" , "Gas in drink" , "Bubbly" , "Effervesce" , "Champagne, say?" .)