Clairvoyant shepherd fleeced lamb lost (4)

I believe the answer is:

amos

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'clairvoyant' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see a link between them that I don't see?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for amos that I've seen before include "Part of bible" , "man" , "Hebrew prophet" , "30th OT book" , "Biblical prophet and OT book" .)

I've seen this clue in the Sydney Morning Herald.

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