After downsizing, Newcastle use bionic footballer (7)

I believe the answer is:

eusebio

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'after downsizing' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'newcastle use bionic footballer' is the wordplay.
'EUSEBIO' is hidden in amongst the letters.
But, I am uncertain how this is indicated.

Can you help me to learn more?

I've seen this clue in The Times.

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