Hospital employee's unusual surname the Parisian adopted (4,5)
I believe the answer is:
'hospital employee's' is the definition.
(someone working in a hospital)
'unusual surname the parisian adopted' is the wordplay.
'unusual' is an anagram indicator.
'the parisian' becomes 'le' (definite article in French).
'adopted' is an insertion indicator (inserted letters are welcomed or adopted).
'surname' is an anagram of 'manurse'.
'manurse' enclosing 'le' is 'MALE NURSE'.