Keep out of a drinking place (3)
I believe the answer is:
bar
I believe this is a double definition.
'keep out' is the first definition.
(I've seen this in another clue)
'drinking place' is the second definition.
'of a' is the link.
(Other definitions for bar that I've seen before include "Prohibit - drinking place" , "Save; pub" , "Obstruct" , "Length of wood or metal - drinking place" , "In Mississippi, measure" .)