Someone like Tom or Remus (3)

I believe the answer is:

sam

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'remus' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see an association between them that I can't see?

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for sam that I've seen before include "Boy" , "Casablanca piano player" , "Uncle" , "together once" .)

I've seen this clue in the Evening Standard.

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