An effervescent beer in village restaurant (5)
I believe the answer is:
lager
'an effervescent beer' is the definition.
(I've seen this before)
'in village restaurant' is the wordplay.
'in' indicates the answer is hidden within the clue.
'LAGER' is hidden in the letters of 'village restaurant'.
(Other definitions for lager that I've seen before include "Bottom-fermented beer" , "light ale" , "A regal sort of drink" , "Continental beer" , "Tipple" .)