Selected comments maybe from drinker finally accepted by bar (7)
I believe the answer is:
excerpt
'selected comments maybe' is the definition.
'drinker finally accepted by bar' is the wordplay.
'drinker finally' becomes 'r' (I can't explain this - if you can you should give a lot more credence to this answer).
'accepted by' means one lot of letters goes inside another.
'bar' becomes 'except' (both can mean 'not including').
'r' going within 'except' is 'EXCERPT'.
'from' acts as a link.
(Other definitions for excerpt that I've seen before include "Piece selected from a film" , "bit of work" , "Extracted passage from book" , "Selected passage from larger work" , "Passage taken from a larger work" .)