The term 'Screen Dog' refers to a type of job that involves monitoring and controlling the access of people to a certain area. The crossword solution for this term is ASTA, which stands for Access Security Technician Assistant. This is a position that requires someone to be responsible for the security of a particular area, such as a building or a facility. They are responsible for ensuring that only authorized personnel have access to the area and that all security protocols are followed. They also monitor the area for any suspicious activity and report it to the appropriate authorities.