Whisky certainly available here over bar (4)
I believe the answer is:
oban
'whisky certainly available here' is the definition.
(Scottish town - whisky often comes from Scotland)
'over bar' is the wordplay.
'over' becomes 'o' (cricket abbreviation).
'bar' becomes 'ban' (I've seen this before).
'o'+'ban'='OBAN'
(Other definitions for oban that I've seen before include "Scottish west coast fishing and ferry port" , "Port and holiday centre on the west coast of Scotland" , "Argyll and Bute resort" , "Scottish port and resort" , "Northern port" .)