Fix old man up after time in bar
I believe the answer is:
'bar' is the definition.
('taproom' can be a synonym of 'bar')
'fix old man up after time' is the subsidiary indication.
'fix' becomes 'moor' (mooring is a kind of fixing**).
'old man' becomes 'pa' ('pa' can be a synonym of 'old man').
'up' is a reversal indicator (in down clue: letters go upwards).
'after' means one lot of letters go next to another.
'time' becomes 't'.
'moorpa' reversed gives 'aproom'.
'aproom' put after 't' is 'taproom'.
'in' is the link.
(Other definitions for taproom that I've seen before include "Hotel bar" , "liquor shop" , "Public bar" , "Type of bar" , "Source of beer" .)