
1) Auto show 2) Summer event in Australia 3) Trade fair in Australia
Found on
https://www.crosswordclues.com/clue/summernats

Summernats, short for Summer Nationals, is a car festival held in Canberra, Australia since 1987. Summernats is held annually, usually at the start of the year. Summernats is the best known car festival in Australia, and an event which attracts many tourists to Canberra, bringing about $12–$15 million to the ACT economy.{fact|date=January 2014} ...
Found on
http://en.wikipedia.org/wiki/Summernats
No exact match found.