In a regal way, he's as good as Reg (3)

I believe the answer is:

roy

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'in a regal way he's as good as reg' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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(Other definitions for roy that I've seen before include "- Orbison, US singer" , "Rob . . . was a notorious Scottish outlaw" , "Rob .... was a famous Scottish bandit" , "Man" , "Rob . . . was a famous Scottish outlaw" .)

I've seen this clue in the Evening Standard.

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