Dean upset Scandinavian (4)
I believe the answer is:
dane
'scandinavian' is the definition.
(person from Denmark)
'dean upset' is the wordplay.
'upset' indicates anagramming the letters.
'dean' anagrammed gives 'DANE'.
(Other definitions for dane that I've seen before include "Scandinavian" , "Hamlet was one" , "invader once" , "One from Esbjerg" , "Hamlet, say" .)