Drinking venue (3)
'drinking venue' is the definition.
This is all the clue.
(Other definitions for bar that I've seen before include "Iron rod or drinks counter" , "Unit of music" , "Except - lawyers" , "Sandbank; prohibit" , "Batten" .)
(Other definitions for pub that I've seen before include "Inn, tavern" , "Tavern, hostelry" , "Slug and Lettuce, perhaps" , "A familiar hostelry" , "Place to drink" .)