Point endlessly made in pub (3)
I believe the answer is:
bar
'pub' is the definition.
(both are drinking establishments)
'point endlessly' is the wordplay.
'point' becomes 'barb' (barb is a kind of point).
'endlessly' means to remove the last letter.
'barb' with its last letter taken away is 'BAR'.
'made in' acts as a link.
(Other definitions for bar that I've seen before include "Prevent; pub" , "Sandbank; drinking place" , "Local" , "Lawyers; pub" , "Length of wood or metal - drinking place" .)