Secure watering hole (3)
I believe the answer is:
bar
I believe this is a double definition.
'secure' is the first definition.
(barring is a kind of securing)
'watering hole' is the second definition.
(watering hole can mean a drinking establishment)
(Other definitions for bar that I've seen before include "Pub; block (access)" , "What drinkers head for" , "Prohibit - drinking place" , "Sandbank; drinking place" , "Prohibit; counter" .)