The term COLOURLESS ALCOHOL can be solved by the five-letter word VODKA. Vodka is a clear, distilled alcoholic beverage made from fermented grains or potatoes. It is one of the most popular spirits in the world and is commonly used in cocktails and mixed drinks. It is also often consumed neat or on the rocks. Vodka has a relatively neutral flavor and is usually not aged, making it a popular choice for those who prefer a smooth, clean taste.