A bit of music in the pub? (3)
I believe the answer is:
bar
I believe this clue is a double definition.
'a bit of music' is the first definition.
(as in a bar of music)
'the pub?' is the second definition.
(both are drinking establishments)
'in' acts as a link.
(Other definitions for bar that I've seen before include "Obstruct" , "Prohibit; pressure unit" , "Obstacle" , "whose moaning Tennyson hoped to prevent?" , "Batten" .)