Form of acting, extremely original in show once more (4-4)
I believe the answer is:
role-play
'form of acting' is the definition.
'extremely original in show once more' is the wordplay.
'extremely' suggests removing the centre.
'in' is an insertion indicator.
'show once more' becomes 'replay'.
'original' with its centre taken out is 'ol'.
'ol' put into 'replay' is 'ROLE-PLAY'.
(Other definitions for role-play that I've seen before include "Pretending to be in an imaginary situation" , "Participation in acting game" , "Acting-out of situations" , "Acting as psychotherapy" , "pretend to be someone else" .)