Take a stand against this thing (6)

I believe the answer is:

object

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

I cannot understand how the rest of the clue works.

(Other definitions for object that I've seen before include "Thing or target" , "Thing; demur" , "Express opposition; goal" , "part of sentence" , "Make protest, disagree" .)

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

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