Nurse is behind insurers these days to get authorisation (7)
I believe the answer is:
licence
'authorisation' is the definition.
(I have seen 'Official authorisation ' mean 'licence' so perhaps 'authorisation' could also mean 'licence')
'nurse is behind insurers these days' is the wordplay.
I cannot quite see how this works, but
'nurse' could be 'en' (abbreviation for enrolled nurse) and 'en' is found in the answer.
'these days' could be 'ce' (I've seen this in other clues) and 'ce' is located in the answer.
This explanation may well be incorrect...
'to get' acts as a link.
Can you help me to learn more?
(Other definitions for licence that I've seen before include "Permit to operate" , "Permit; certificate" , "Leave" , "Permit - freedom" , "Certify" .)