Bevvies taken regularly the night before (3)
I believe the answer is:
eve
'night before' is the definition.
(eve can mean the night before something)
'bevvies taken regularly' is the wordplay.
'taken regularly' means one should take alternating letters (letters removed at regular intervals).
The alternating letters of 'bevvies' are 'EVE'.
'the' acts as a link.
(Other definitions for eve that I've seen before include "Day before Christmas" , "Previous day" , "Day before (an event)" , "Later in the day, in short" , "Adam & - -" .)