Crossword Genius

Vagrants join fireside circles (5)

Ross

I believe the answer is:

hobos

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'vagrants' is the definition.
(I've seen this in another clue)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Another definition for hobos that I've seen is " Tramps".)

I've seen this clue in The Globe and Mail.
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