Black, semi-solid substance that occurs as a residue from petroleum distillation (7)
I believe the answer is:
asphalt
(Other definitions for asphalt that I've seen before include "Mixture of tar and gravel used in road surfaces" , "Paving material" , "Material for road surfacing etc" , "Bituminous material for roofing, paths etc" , "Bituminous substance used for roofs and roads" .)