The term 'RUNWAY ZONE' is a combination of two words, 'RUNWAY' and 'ZONE'. RUNWAY is an area of land at an airport that is used for takeoffs and landings of aircrafts. ZONE is an area that is designated for a specific purpose or activity. Therefore, the term 'RUNWAY ZONE' refers to an area of land at an airport that is specifically designated for aircrafts to take off and land. The crossword solution for this term is 'AIRFIELD', which is an open area of land used for aviation purposes.