Social need at intervals to get drunk (5)
I believe the answer is:
oiled
'get drunk' is the definition.
(I've seen this before)
'social need at intervals' is the wordplay.
'at intervals' indicates alternate letters (letters are taken at regular intervals).
'social'+'need'='socialneed'
The alternating letters of 'socialneed' are 'OILED'.
'to' is the link.
(Other definitions for oiled that I've seen before include "as silk may be" , "Oldie (anag)" , "Besotted" , "running smoothly?" , "get drunk" .)