Banter with pair of females after a drink (5)
I believe the answer is:
chaff
'banter' is the definition.
(I know that banter can be written as chaff)
'pair of females after a drink' is the wordplay.
'pair of females' becomes 'FF' (the abbreviation for female repeated).
'after' says to put letters next to each other.
'a drink' becomes 'cha' (cha can mean tea).
'ff' put after 'cha' is 'CHAFF'.
'with' acts as a link.
(Other definitions for chaff that I've seen before include "Corn-husks separated from the grain" , "fodder" , "twit" , "Winnowed husks of grain" , "Husks - jokes" .)