The crossword solution for the term 'BACK AT THE TRACK' is 'BETON', which is an abbreviation for 'Betonbahn', a type of concrete railway track developed in Germany in the late 19th century. Betonbahn was designed to be more durable and cost-effective than traditional wooden railway tracks, and it quickly became popular throughout Europe. Today, Betonbahn is still used in many countries, including Germany, Austria, and Switzerland.