His family moved to Batugedara, Ratnapura, and Clarence abandoned a career as a budding planter to pursue music full-time.
He married Sheela Ramadasa and they had one daughter, Amila Priyadarshani. Wijewardena formed the Moonstones at the age of 21 with Annesley Malewana as lead vocalist. Managed by an advertising icon, Sri Sangabo Corea, the group recorded several songs to be aired on the Saturday Star program in 1966. The young musicians were mentored by Sri Sangabo Corea together with veteran Radio Ceylon/SLBC broadcasters Vernon Corea and Vijaya Corea. Their 1968 debut EP Mango Nanda was released on the JVPC007 Philips label selling up to 5,000 copies.
It included the songs “Mango Nanda,” “Ruwan Puraya,” “Seetha Ude” and “Menike.” The sophomore release More Hits by the Moonstones came out November that year on the Sooriya label and included the hits “Kalu Mama”, “Rosa male”, “Ramani” and “Goyam Kapanawa.” “Mango Nanda” was selected the best Sinhala song by the Hit Parade program on Radio Ceylon.
