On your feet - honest? (7)

I believe the answer is:

upright

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'honest?' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for upright that I've seen before include "Moral" , "Honest like a vertical post" , "Vertical like rugby goal post" , "Honest (like a piano?)" , "Pole; principled" .)

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

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