Under the Sun' is an idiom that means 'in this world'. It is often used to express the idea that something is as good as it can be, or that there is no other way to do something. The crossword solutions for this term are EVIL (4 letters), Tuscan (6 letters), and EXTANT (6 letters). EVIL is a word that describes something that is morally wrong or bad. Tuscan is a region in Italy known for its beautiful landscapes and art. EXTANT is an adjective that means still existing or in existence.