Criminal uproar reheard regularly (9)
I believe the answer is:
racketeer
'criminal' is the definition.
(racketeer is a kind of criminal)
'uproar reheard regularly' is the wordplay.
'uproar' becomes 'racket' (I've seen this before).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternate letters of 'reheard' are 'eer'.
'racket'+'eer'='RACKETEER'
(Other definitions for racketeer that I've seen before include "fraudster" , "someone to make a dodgy deal?" , "Wide boy" , "Dodgy dealer" , "Criminal trader" .)