Eight years before her sister Karin participated, Clashing qualified for the same event, 50-metre freestyle, at the 2004 Summer Olympics in Athens, as a 14-year-old swimmer from Antigua. She received a Universality place from FINA in an entry time of 34.36. She challenged six other swimmers in heat two, including Bahrain's Sameera Al-Bitar, who shared the same age with Clashing. She posted a lifetime best of 31.55 to earn a fourth spot by 0.55 of a second behind joint winners Al-Bitar and Ghazal El Jobeili of Lebanon. Clashing failed to advance into the semifinals, as she placed 67th overall on the last day of preliminaries.