Mix cranberry juice, vodka, amaretto, and orange juice in pitcher. Cover and chill until ready to serve. DO AHEAD: Can be prepared 1 day ahead. Keep refrigerated. To make 2 drinks, fill cocktail shaker with ice cubes. Pour in scant 1 cup vodka mixture. Cover and shake vigorously. Strain into 2 Martini glasses. Garnish each with clementine segment. Repeat 3 times with ice cubes, remaining vodka mixture, and clementine segments.