Alcoholic drink consumed by Voltaire à la légère (4,3)
I believe the answer is:
real ale
'alcoholic drink' is the definition.
'real ale' can be an answer for 'drink' (I've seen this before). I am not certain of the 'alcoholic' bit.
'consumed by voltaire a la legere' is the wordplay.
'consumed by' indicates the answer is hidden within the clue (I've seen this in other clues).
'REAL ALE' is hidden in the letters of 'voltaire a la legere'.
Can you help me to learn more?
(Other definitions for real ale that I've seen before include "Beer fermented in cask, served without carbon dioxide" , "Cask-conditioned beer" , "Traditional drink" , "booze" , "The RA in CAMRA" .)