Once you have the Form of Wolf Relic and Garnet and are in the Clock Room with the path open, you can jump above the left candle, transform into Wolf in mid-air and untransform immediately while still above the candle. Doing this enables Alucard to then perform a dive-kick by holding Down and pressing Jump while still in the air. The goal is to bounce off of the candle, which will give you enough height to reach the open path.

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