Crossword Genius

Supporter assisting in what Oliver wanted? (6,7)

Ross

I believe the answer is:

second helping

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'what oliver wanted?' is the definition.
I can't tell whether this defines the answer.

'supporter assisting' is the wordplay.
'supporter' becomes 'second' (second is a kind of supporter).
'assisting' becomes 'helping' ('help' can be a synonym of 'assist').
'second'+'helping'='SECOND HELPING'

'in' acts as a link.

Can you help me to learn more?

I've seen this clue in The Telegraph.
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