A badge for fooling around? (8)
I believe the answer is:
badinage
'fooling around?' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for badinage that I've seen before include "Drollery" , "Backchat, banter" , "Beg Diana with good-humoured teasing" , "Frivolous repartee" , "Amiable banter" .)