It's time for Charlie Parker! (4)
I believe the answer is:
bird
I believe this clue is a double definition.
'it's time' is the first definition.
(both are slang for a prison sentence)
'for charlie parker' is the second definition.
(I've seen this in another clue)
(Other definitions for bird that I've seen before include "Flying creature" , "porridge" , "Feathered animal" , "A prison sentence (slang)" , "Avian" .)