Grounded Australians refers to Australians who are unable to travel due to the COVID-19 pandemic. The term is often used to describe those who have been unable to leave the country or return home due to travel restrictions. The crossword solution for this term is EMUS, which is a type of flightless bird native to Australia. This is an apt description of the situation as many Australians are grounded and unable to fly like the emus.