Married in former nurse’s part of Scandinavia (6)
I believe the answer is:
sweden
'part of scandinavia' is the definition.
(Sweden is in Scandinavia)
'married in former nurse's' is the wordplay.
'married' becomes 'wed' (similar in meaning).
'in' means one lot of letters goes inside another.
'former nurse' becomes 'SEN' (state registered nurse - former UK nurse title).
'wed' inserted inside 'sen' is 'SWEDEN'.
(Other definitions for sweden that I've seen before include "Country with blue and yellow flag" , "Stockholm's country" , "Member country of the European Union" , "Scandinavian kingdom" , "land" .)