Fly around in returning from Scandinavia (6)
I believe the answer is:
danish
'from scandinavia' is the definition.
'fly around in returning' is the wordplay.
'fly' becomes 'dash' (I've seen this before**).
'around' is an insertion indicator.
'returning' is a reversal indicator.
'in' back-to-front is 'ni'.
'dash' going around 'ni' is 'DANISH'.
(Other definitions for danish that I've seen before include "Scandinavian, pastry perhaps" , "Word linking blue and pastry" , "Like Hamlet or bacon?" , "A blue cheese; a pastry" , "Language of Denmark" .)