Fuming burnt gums and resins (8)
I believe the answer is:
incensed
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for incensed that I've seen before include "A high church may become so" , "Very angry, really mad" , "in a lather" , "Infuriated, outraged" , "Cross" .)