Nurse retains European CV (6)
I believe the answer is:
career
'cv' is the definition.
'nurse retains european' is the wordplay.
'nurse' becomes 'carer' (I've seen this before).
'retains' indicates putting letters inside.
'european' becomes 'e' (abbreviation e.g. EU).
'carer' going around 'e' is 'CAREER'.
(Other definitions for career that I've seen before include "One's life's work" , "'Occupation, profession (6)'" , "Progress of working life" , "Progresson through working life" , "Progression through working life" .)