David "Clem" Clempson is an English guitarist and singer-songwriter, best known for his work in the rock and blues genres. Born on December 30, 1949, in Birmingham, England, Clempson gained prominence in the early 1970s as a member of the band Colosseum, where his guitar work was pivotal to the band’s fusion of jazz, rock, and blues. Clempson is particularly noted for his contributions to the band Humble Pie, which he joined in 1971, replacing Peter Frampton. His guitar playing and songwriting on albums such as "Rock On" (1971) and "Smokin’" (1972) helped define the band's sound and solidify their place in rock history. The album "Smokin’" featured the hit single "30 Days in the Hole," showcasing his blend of bluesy rock riffs and powerful vocals. In addition to his work with these bands, Clempson has collaborated with various artists and has pursued a solo career, releasing albums that highlight his versatility as a musician. His influence can be seen in the work of subsequent rock and blues guitarists, making him a respected figure in the genre.