Workshop occupied by strikers (6)

I believe the answer is:

smithy

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'workshop' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for smithy that I've seen before include "Forge worker" , "Workshop with anvil" , "Forger's workshop" , "Vulcan was concerned?" , "Where 3s were made and fitted" .)

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

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