The crossword solution for the term 'Natural Sun Screen' is ELM, which stands for Extra-Virgin Olive Oil. Extra-Virgin Olive Oil is a natural sun screen that has been used for centuries to protect skin from the sun's harmful rays. It is rich in antioxidants and fatty acids, which help to nourish and protect the skin. It is also known to be non-comedogenic, meaning it won't clog pores or cause breakouts.