Stuff the Tories? That's morally correct! (7)

I believe the answer is:

upright

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But I can't explain it at all! Could you help me understand?

(Other definitions for upright that I've seen before include "Un-grand piano" , "Moral" , "Sort of piano" , "Joanna" , "Vertical post in rugby goal - strictly honourable" .)

I've seen this clue in The Sun.

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