In a large bowl, combine wet ingredients - brown sugar, pumpkin puree, vanilla extract, clementine zest and juice, and craisins. Whisk together well.
In a separate medium-sized bowl, whisk together all the dry ingredients - vital wheat gluten, salt, baking soda, baking powder, and cinnamon.
Slowly add dry ingredients to wet ingredients and combine. Avoid over-mixing because it will make the dough tough and chewy. Dough should be glossy/wet but not loose. I use a spatula for this step.
Dump dough into a parchment paper-lined 9"x5" loaf pan.
Bake for 70 - 75 minutes until fully cooked. It should have risen a lot, including the middle. It should be springy and not sunken in - that's how you know it's fully cooked.