Franz of "NYPD Blue” (6)
I believe the answer is:
dennis
'franz of nypd blue' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dennis that I've seen before include "- Wheatley, English novelist" , "-- Potter, playwright" , "___ the Menace (in comic)" , "Man" , "-- Wheatley, English author" .)