One who flies from Scandinavia to Russia (7)
I believe the answer is:
aviator
'one who flies' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'from scandinavia to russia' is the wordplay.
'from' indicates the answer is hidden within the clue.
'AVIATOR' is hidden in the letters of 'scandinavia to russia'.
Can you help me to learn more?
(Other definitions for aviator that I've seen before include "Flyer in early days of planes" , "Navigator of the air" , "Airman" , "One flying aircraft" , "Air pilot" .)