Drinks in midweek? Pass! (6)
I believe the answer is:
elapse
'pass' is the definition.
(synonyms)
'drinks in midweek?' is the wordplay.
'drinks' becomes 'laps' (lapping is a kind of drinking).
'in' is an insertion indicator.
'midweek?' becomes 'ee'.
'laps' placed within 'ee' is 'ELAPSE'.
(Other definitions for elapse that I've seen before include "pass in silence" , "Please (anag) -- pass away" , "Go past" , "Tick by" , "run by" .)