The crossword solution for the term CITY ZONE is 'SECTOR, ' which is a six-letter word. A SECTOR is an area or division of a city, usually defined by geographical boundaries. It is often used to refer to a specific area of a city that has its own unique characteristics and culture. For example, a city may have a downtown SECTOR, a residential SECTOR, and an industrial SECTOR. Each SECTOR may have different types of businesses, housing, and other amenities.