Hit space bar (7)
I believe the answer is:
taproom
'bar' is the definition.
('taproom' can be a synonym of 'bar')
'hit space' is the wordplay.
'hit' becomes 'tap' (I've seen this before).
'space' becomes 'room' (room is a kind of space).
'tap'+'room'='TAPROOM'
(Other definitions for taproom that I've seen before include "liquor shop" , "Public bar" , "Source of beer" , "part of pub" , "Type of bar" .)