"I've been working hard on a brand called Susie Homemaker with a number of products to be released soon," the mother-of-two explained. "I also have been working with a number of charities as well as continuing my association with the CWA [Country Women's Association]."
McLean, who is dating Australian comedian Mick Molloy, joined the series in season three.
'The Real Housewives of Melbourne' cast at the 2017 Logie Awards
So far returning to season four are the original cast members including Gina Liano, Jackie Gilles, Janet Roach and Lydia Schiavello, plus Gamble Breaux who joined in season two.