Reacts to bad jokes by playing organs (6)
I believe the answer is:
groans
'reacts to bad jokes' is the definition.
I can't judge whether this defines the answer.
'playing organs' is the wordplay.
'playing' is an anagram indicator.
'organs' with letters rearranged gives 'GROANS'.
'by' is the link.
Can you help me to learn more?
(Other definitions for groans that I've seen before include "Complains" , "Sounds of pain or disapproval" , "Grumbles" .)