Levi Roots was a musician before his Dragons' Den success made him widely known as a food entrepreneur.
Levi Roots is the stage name of Keith Valentine Graham, a British-Jamaican reggae musician. He had a music career before presenting his sauce business on Dragons' Den, and his musical identity remained closely connected to the branding and public image of his food company.
Roots’s appearance demonstrated how an existing creative career could support an entrepreneurial venture. The sauce pitch drew on Jamaican food traditions, reggae culture and his experience performing for audiences. After investment, the business expanded into a larger commercial brand.
He is often described in short form as a chef or entrepreneur, both of which are accurate descriptions of his later public work. However, the question asks about his earlier profession, for which “musician” is the specific answer.