raillery (8)
I believe the answer is:
badinage
'raillery' is the definition.
(I know that badinage is a type of raillery)
This is all the clue.
(Other definitions for badinage that I've seen before include "Drollery" , "Playful banter" , "A big Dane given to banter" , "Humorous banter" , "Frivolous repartee" .)