Preheat oven to 350°. Spray a 8.5x4.5 loaf pan with baking spray.

Add sugar to a bowl. Use a microplane to zest clementines over the sugar. Use your fingers to rub the zest into the sugar until the oil is released and the sugar is fragrant.

Peel the clementines and cut in between the membranes and pull out the fruit. Place on a paper towel. Set aside.

Whisk flour, baking powder, and salt in a medium bowl.

Whisk the yogurt into the reserved sugar mixture. Whisk eggs in one at a time, beat vigorously until smooth. Add vanilla and orange extract.

Add the dry ingredients and whisk until you cannot see any trace of flour. Switch to a rubber spatula and stir in the oil. Add the clementine segments. And stir until just combined. Pour batter into prepared loaf pan. Sprinkle with sanding sugar.

Bake for 50 to 60 minutes or until a toothpick comes out clean. Transfer to a wire rack to cool for 5 minutes, then remove from the pan and cool completely.