### Clue: Black market trader's location (5)
### Answer: PITCH 
 ### Explanation: Definition: Black,market trader's location
  Double defn: 1st Answer: Any of black viscous substances used for caulking and paving, or tar and asphalt for roads.  But I'm not sure how to use black as a noun in this sense;  I know of shoe-black, which is a dye/pigment but not pitch, and there is the derived adjective pitch-black; and 2nd Answer: A vendor,trader's stall,location in a market.  Nice surface with "black market trader".