Making music, really hot (6)
I believe the answer is:
piping
'really hot' is the definition.
(I've seen this before)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for piping that I've seen before include "Long tubes" , "Descriptive of very hot food" , "Tube; very hot" , "really hot" , "The playing" .)