Burn with rage about king (6)
I believe the answer is:
stream
'burn' is the definition.
(burn is a Scottish dialect word for a stream)
'rage about king' is the wordplay.
I cannot really understand how this works, but
'about' could be 'rea' (I've seen this in other clues) and 'rea' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
'with' acts as a link.
Can you help me to learn more?
(Other definitions for stream that I've seen before include "schoolchildren grouped together" , "Brook, burn" , "divide pupils into ability groups" , "Natural body of running water" , "course" .)