Four getting stuck into the drink, bubbly (5)
I believe the answer is:
alive
'bubbly?' is the definition.
(I've seen this in another clue)
'four getting stuck into the drink' is the wordplay.
'four' becomes 'IV' (Roman numerals).
'getting stuck into' indicates putting letters inside.
'the drink' becomes 'ale' (type of beer).
'iv' going inside 'ale' is 'ALIVE'.
(Other definitions for alive that I've seen before include "full of vitality" , "Existent" , "Animated and kicking" , "Spirited" , "Animated, on the ball" .)