Twist one microphone, briefly, switching it around in jest (9)
I believe the answer is:
witticism
'jest' is the definition.
(thesaurus)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for witticism that I've seen before include "Quip" , "Clever remark" , "Sparkling remark" .)