If wrong, he gets fined! (3)

I believe the answer is:

ned

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'if wrong he' is the definition.
The definition suggests a singular noun which matches the answer.

'fined' is the wordplay.
'NED' is hidden within the letters.
But, I am uncertain how this is indicated.

'gets' is the link.

Can you help me to learn more?

(Other definitions for ned that I've seen before include "A den for Edward" , "rough" .)

I've seen this clue in the Evening Standard.

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