Crossword Genius

Reject skin of rice pudding one had for lunch? (9)

Ross

I believe the answer is:

repudiate

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'lunch?' is the definition.
Although both the answer and definition are verbs in their base form, I can't understand how they can define each other.

'reject skin of rice pudding one had' is the wordplay.
'reject' shows that the letters should be reversed in order.
'skin of rice pudding' becomes 'duper' (I can't explain this - if you can you should give a lot more credence to this answer).
'one' becomes 'I' (Roman numeral).
'had' becomes 'ate' (e.g. I had an ice cream).
'duper' reversed gives 'repud'.
'repud'+'i'+'ate'='REPUDIATE'

'for' is the link.

Can you help me to learn more?

(Other definitions for repudiate that I've seen before include "Reject or deny as unfounded" , "Reject and refuse to acknowledge" , "Reject as untrue or unjust" , "Give denial" , "Make a disclaimer" .)

I've seen this clue in The Times.
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