Bar banter (4)
I believe the answer is:
rail
This clue might be a double definition.
'bar' is the first definition.
(rail is a kind of bar)
'banter' is the second definition.
The answer and definition can be both to do with communicating as well as being verbs in their base form.
Perhaps you can see an association between them that I can't see?
Can you help me to learn more?
(Other definitions for rail that I've seen before include "Horizontal bar - bird - complain" , "Complain intemperately" , "The permanent way" , "Water bird; barrier" , "Track - complain - bird" .)