The term 'BRIT'S RAINWEAR' can be broken down into two parts: the word 'BRIT' and the phrase 'RAINWEAR'. The crossword solution for 'BRIT' is MAC, which is an acronym for 'Member of the Order of the British Empire'. This is a title given to individuals in the United Kingdom who have made significant contributions to their field or to society in general. The phrase 'RAINWEAR' refers to clothing that is designed to protect the wearer from rain. This could include items such as raincoats, rain boots, and umbrellas. Therefore, the complete term 'BRIT'S RAINWEAR' refers to clothing that is designed to protect the wearer from rain and is associated with the title of Member of the Order of the British Empire.