Snow from burnt coal (4)
I believe the answer is:
coke
'coal' is the definition.
(thesaurus)
'snow from burnt' is the wordplay.
'snow' becomes 'C' (synonyms).
'from' is a charade indicator (letters next to each other).
'burnt' becomes 'oke' (I am not sure about this - if you are sure you should believe this answer much more).
'c'+'oke'='COKE'
Can you help me to learn more?
(Other definitions for coke that I've seen before include "Drink - drug - solid-fuel product" , "something for heating" , "Carbonised fuel residue" , "Fuel derived from coal" , "Residue from coal used as fuel" .)