The song Leclercq performed in the 1962 Contest is notable for being the (joint) first song performed at the Contest that scored zero points. (45 possible).
He represented Belgium at the Eurovision Song Contest four times.
He was also the pianist of Juliette Gréco.
On his return to Belgium he began a new career as a building contractor.
Leclerc had a career as a pianist, accordionist, songwriter and singer before retiring to travel the world.
Leclerc was invited to ESC 2005 by the Belgian TV network RTBF as a guest star.