Dense black substance (3)
I believe the answer is:
tar
(Other definitions for tar that I've seen before include "Thick, black and sticky liquid" , "Pitch; sailor" , "Dark liquid used on roads" , "Informal sailor, the rat" , "Sailor (colloq.)" .)
I believe the answer is:
tar
(Other definitions for tar that I've seen before include "Thick, black and sticky liquid" , "Pitch; sailor" , "Dark liquid used on roads" , "Informal sailor, the rat" , "Sailor (colloq.)" .)