Throw black stuff (5)
I believe the answer is:
pitch
This might be a double definition.
'throw' is the first definition.
(I know that pitch is a more specific form of the action the throw)
'black stuff' is the second definition.
'pitch' can be an answer for 'black' (thesaurus). I am not sure about the 'stuff' bit.
Can you help me to learn more?
(Other definitions for pitch that I've seen before include "Tar; toss" , "Football ground" , "Football/cricket area" , "Erect (tent); steepness of roof" , "Timbre" .)