Induct wags into transports of mirth (9)
I believe the answer is:
jocundity
'mirth' is the definition.
(thesaurus)
'induct wags into transports' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'induct' is 'cundit' which is within the answer.
The remaining letters 'joy' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'of' acts as a link.
Can you help me to learn more?
(Another definition for jocundity that I've seen is " Cheerfulness".)