Cook the rice following pack instructions. Drain, rinse in cold water to cool down, then drain again thoroughly. Put the rice into a serving bowl.Remove the peel from 3 clementines, taking off as much pith as possible. Cut into chunky slices. Squeeze the juice from the remaining clementine into a bowl and mix with the olive oil. Season with salt and pepper.Add the clementine dressing to the rice along with the cranberries, spring onions, walnuts and parsley. Toss to combine and then fold through the clementine slices. Season and serve.