In a bowl, combine flours, baking powder, cinnamon, cloves and salt.
In a second bowl, beat together sugars, canola oil, egg and yogurt. Add to flour mixture, stirring just until combined. Fold in carrots and nuts.
Spoon batter into prepared pan. Cover tightly with foil and secure with a string or elastic band. Place pan in slow cooker stoneware and pour in enough boiling water to come 1 inch up the sides of the dish. Cover and cook on high for 4 hours or low for a bit longer - until a tester inserted in the center of the loaf comes out clean. Unmold and serve warm or let cool.