The term 'foreign exchange FEE' can be broken down into two words: 'foreign exchange' and 'FEE'. The word 'foreign exchange' refers to the process of exchanging one currency for another, while the word 'FEE' refers to a payment made for a service or product. The crossword solution for this term is 'agio', which is a term used in finance to refer to the difference between the buying and selling prices of a currency. Agio is also known as the exchange rate margin, and it is the FEE charged by banks and other financial institutions when exchanging one currency for another.