Showtime crime series (6)
I believe the answer is:
dexter
'showtime crime series' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for dexter that I've seen before include "televised antihero, > right?" , "breed of cattle from Ireland" , "Colin --, Inspector Morse creator" , "On the right-hand side in heraldry" , "Crime author" .)