The term 'TONIC GO-WITH' is a crossword solution that refers to two types of alcoholic beverages: Vodka (5 letters) and GIN (3 letters). Vodka is a distilled beverage composed primarily of water and ethanol, and it is usually made from grains or potatoes. GIN is a spirit flavored with juniper berries and other botanicals, and it is typically made from grain. Both Vodka and GIN are commonly served with tonic water as a cocktail.