Creep removes both names from rave report (6)
I believe the answer is:
ratbag
'creep' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?
I don't understand the rest of the clue.
(Other definitions for ratbag that I've seen before include "snake" , "unpleasant customer" , "bounder" , "One displaying bad form" , "Grab at (anag) - contemptible person" .)