The term 'Fail to Trade' is a financial term that refers to when a buyer and seller are unable to complete a transaction. This can be due to a variety of reasons, such as the buyer not having enough funds or the seller not having the item in stock. The crossword solution for this term is KEEP, which is an acronym for 'Knowledgeable Experienced Evaluative Professional'. This acronym is used to describe a professional who is knowledgeable and experienced in evaluating financial transactions, and is often used to help buyers and sellers complete their transactions successfully.