Throw black stuff (5)
I believe the answer is:
pitch
This clue might be a double definition.
'throw' is the first definition.
(pitch is a kind of throw)
'black stuff' is the second definition.
'pitch' can be an answer for 'black' (thesaurus). I'm 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" .)