Commotion caused by Norwegian group following end of pub happy hour (8)
I believe the answer is:
brouhaha
'commotion' 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 brouhaha that I've seen before include "rumpus" , "Great fuss" , "Kind of commotion - ends in laughter?" , "Loud, confused noise" , "Sensation" .)