Bar making a comeback for merrymaking (5)
I believe the answer is:
revel
'merrymaking' is the definition.
(revel is a kind of merrymaking)
'bar making a comeback' is the wordplay.
'bar' becomes 'lever' (lever is a kind of bar).
'making a comeback' is a reversal indicator.
'lever' backwards is 'REVEL'.
'for' is the link.
(Other definitions for revel that I've seen before include "Have noisy fun" , "Lever (anag.)" , "Paint the town red" , "Make merry; luxuriate (in)" , "Feast riotously" .)