Drink playing a part in bootlegging era legitimised (6,3)
I believe the answer is:
ginger ale
'drink' is the definition.
(ginger ale is a kind of drink)
'playing a part in bootlegging era legitimised' is the wordplay.
'playing a part in' indicates a hidden word.
'GINGER ALE' is hidden in the letters of 'bootlegging era legitimised'.
(Other definitions for ginger ale that I've seen before include "Fizzy drink" , "It won't make you drunk!" , "One drink" , "pop" , "Spicy, sweetened non-alcoholic drink" .)