1) Ephemeris time 2) Groovy 3) Series of crawler tractors 4) Terrestrial dynamical time 5) Terrestrial time 6) Time unit 7) Unit of time Found on https://www.crosswordclues.com/clue/tdt
[TV station] ==Introduction== In Australia, the major capital cities, and a majority of the regional areas, are served by three commercial broadcasters. However, some less populated areas are only granted two licenses (and until the early 2000s, one in some cases). This is because the Australian Broadcasting Authority (ABA) believes that th... Found on http://en.wikipedia.org/wiki/TDT_(TV_station)