Temporary fireplace! (4)

I believe the answer is:

camp

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'temporary fireplace' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I can't see?

This is the entire clue.

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(Other definitions for camp that I've seen before include "Temporary accommodation; exaggeratedly theatrical" , "Pitch tents; affected" , "group of supporters" , "Temporary military site" , "doctrinaire group" .)

I've seen this clue in the Evening Standard.

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