Like a dead parrot? (2,4)
I believe the answer is:
no more
'like a dead parrot?' is the definition.
(reference to Monty Python's dead parrot sketch)
This is the entire clue.
(Other definitions for no more that I've seen before include "Never again, that's the end of it" , "opposite of what Oliver wanted" , "That's all - finished" , "Never again, that's the lot" , "Nothing further" .)