Playing music while engaged in illegal activity? (2,3,6)
I believe the answer is:
on the fiddle
'while engaged in illegal activity?' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'playing music' is the wordplay.
I cannot quite see how this works, but
'playing' could be 'on' (on can mean playing or performing) and 'on' is found in the answer.
'music' could be 'f' and 'f' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for on the fiddle that I've seen before include "Running a racket" , "leader of the orchestra?" , "Dishonest" , "Cheating (colloq.)" , "Engaged in cheating" .)