1. Combine yogurt and vanilla in a bowl. Spoon 1/3 cup yogurt mixture into each of 4 small parfait glasses; top each with 1/2 teaspoon honey, 5 clementine sections, and 1/2 tablespoon nuts.
2. Top parfaits with the remaining yogurt mixture (about 1/3 cup each); top each with 1/2 teaspoon honey, 2 clementine segments, and 1/2 tablespoon nuts. Serve immediately.