Crossword Genius

Favourable slant given to wrong grasp of power (4)

Ross

I believe the answer is:

spin

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

(Other definitions for spin that I've seen before include "Rotate, twirl" , "Make thread; go round" , "cycle ride" , "Work natural fibres into a thread or twist a story" , "some doctors deal with" .)

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