They carry logs in ominous mists for Spooner (8)

I believe the answer is:

firedogs

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'they' is the definition.
Both the definition and answer are plural nouns.
Perhaps there's an association between them I don't understand?

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

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(Another definition for firedogs that I've seen is " Andirons".)

I've seen this clue in The Times and The Sunday Times.

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