Related Clues:

• Drawing at top table missing one with black stuff
• Black carbon from burning wood
• Carbon stick for drawing
• Artist, initially in depression, keeping up daily drawing
• Check curve round a lake, using coloured sticks
• Drawing material
• Coke that is dumped containing poisonous gas, a type of fuel
• Carbonised wood
• What gets Barbie going? Tea and soft drink with a final flip
• Dark-grey compound of carbon, hydrogen, argon, cobalt and aluminium
• Form of carbon for drawing
• Drawing fish caught initially on a line
• Dark grey colour
• Article penned by colonel on Daily Sketch?
• Burn one fuel to get another