Central section in finale came on once more (7)
I believe the answer is:
encored
'came on once more' is the definition.
Although both the answer and definition are past participle verbs, I don't see how they can define each other.
'central section in finale' is the wordplay.
'central section' becomes 'core' (I've seen this in another clue).
'in' is an insertion indicator.
'finale' becomes 'end' (the end of a story or show).
'core' placed inside 'end' is 'ENCORED'.
Can you help me to learn more?
(Other definitions for encored that I've seen before include "Asked to repeat" , "Red cone (anag.)" .)