The finale allegedly sounds Scandinavian (6)
I believe the answer is:
finish
'the finale' is the definition.
('finish' can be a synonym of 'finale')
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for finish that I've seen before include "End, conclusion" , "Refinement in social graces" , "Perfect" , "curtains" , "perfection" .)