Doing a deal is a term used to describe the process of negotiating and agreeing on a transaction between two or more parties. It involves coming to an agreement on the terms of the deal, such as the price, quantity, and delivery date. The term 'do a deal' is often used in business contexts, but can also be used in other situations, such as when buying or selling a house. The crossword solution for this term is 'TRANSACT', which means to carry out a business or financial transaction.