[1] In 1968, she claimed her first Australian title in the 100-metre butterfly, earning selection for the Mexico City Olympics, where she was considered an outsider for the event.

In the 4×100-metre medley relay, she combined with Lynne Watson, Judy Playfair and Janet Steinbeck to claim silver behind the United States team.

McClements was said to be lacking confidence prior to the 100-metre butterfly, until the men's captain Michael Wenden pulled her aside in an attempt to coax her into believing that she could win.

She relegated the American pair of Ellie Daniel and Susan Shields into the minor medals and world record-holder Ada Kok to fourth, posting a time of 1 minute 5.5 seconds.

Her daughter, Jacqueline McKenzie, represented Australia at the 1992 Summer Olympics in the 200-metre and 400-metre individual medley.