Scandinavian girl? Put her letters here! (6)
I believe the answer is:
ingrid
'scandinavian girl?' is the definition.
(Ingrid is a Scandinavian name)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for ingrid that I've seen before include "___ Bergman, Swedish actress" , "A lady" , "Riding (anag) - girl's name" , "girl" .)