Type of plum pudding finish is involved once more (10)

I believe the answer is:

greengages

I'm a little stuck... Click here to teach me more about this clue!

'finish is involved once more' is the definition.
I can't judge whether this definition defines the answer.

'type of plum pudding' is the wordplay.
'type of plum' becomes 'greengage' (I've seen this before).
'pudding' becomes 's' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'greengage'+'s'='GREENGAGES'

Can you help me to learn more?

(Another definition for greengages that I've seen is " fruit".)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.