Tod alone (5)

I believe the answer is:

sloan

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'tod' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for sloan that I've seen before include "snub in Glasgow" , "Scots snub" .)

I've seen this clue in the Evening Standard.

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