Comic Dangerfield (6)
I believe the answer is:
rodney
'comic dangerfield' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for rodney that I've seen before include "Chap" , "Man" , "Richard - Bennett, English composer" , "Del Boy's half-brother in Only Fools and Horses" , "Del Boy's brother" .)