Spiel, dark stuff (5)
I believe the answer is:
pitch
This clue could be a double definition.
'spiel' is the first definition.
(I've seen this in another clue)
'dark stuff' is the second definition.
The definition and answer can be both human attributes as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
Can you help me to learn more?
(Other definitions for pitch that I've seen before include "Level of sound" , "Throw; tar" , "Cricket-playing area" , "Tar; lob" , "Degree of intensity" .)