Conflict said to be brewing with European briefly (8)
I believe the answer is:
disagree
'conflict' is the definition.
(I've seen this before)
'said to be brewing with european briefly' is the wordplay.
'to be brewing' indicates anagramming the letters (I've seen 'being brewed' mean this).
'with' is a charade indicator (letters next to each other).
'european briefly' becomes 'gree' (I can't explain this - if you can you should believe this answer much more).
'said' with letters rearranged gives 'disa'.
'disa'+'gree'='DISAGREE'
Can you help me to learn more?
(Other definitions for disagree that I've seen before include "Have conflicting opinions" , "Hold different opinions" , "source of conflict" , "Be at variance" , "Have differing opinions" .)