Partly burn a fuel that draws well (8)
I believe the answer is:
charcoal
'a fuel that draws well' is the definition.
'charcoal' can be an answer for 'a fuel' (charcoal is a kind of fuel). I'm not certain of the remainder of the definition.
'partly burn' is the wordplay.
'partly' becomes 'char' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'burn' becomes 'coal' (coaling is a kind of burning).
'char'+'coal'='CHARCOAL'
Can you help me to learn more?
(Other definitions for charcoal that I've seen before include "Black carbon produced by burning wood" , "Black carbon from burnt wood" , "Fuel made from burnt wood" , "Very dark gray color" , "Form of carbon for drawing" .)