Raducanu's back, more confident one wants high returns (6)

I believe the answer is:

usurer

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'one wants high returns' is the definition.
I can't judge whether this defines the answer.

'raducanu's back more confident' is the wordplay.
'back' says to take the final letters (the letter at the back).
'more confident' becomes 'surer' ('sure' can be similar in meaning to 'confident').
The final letter of 'raducanu' is 'u'.
'u'+'surer'='USURER'

Can you help me to learn more?

(Other definitions for usurer that I've seen before include "Person who charges excessive interest on loan" , "Extortionate moneylender" , "Lender who charges exorbitant interest rates" , "Loan shark" , "Shylock, for example" .)

I've seen this clue in The Guardian.

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