Examiner for each employer (7)
I believe the answer is:
peruser
'examiner' is the definition.
(I've seen this in another clue)
'each employer' is the wordplay.
'each' becomes 'per' ('per' can mean for each).
'employer' becomes 'user' (someone who employs or uses something).
'per'+'user'='PERUSER'
'for' is the link.
(Other definitions for peruser that I've seen before include "One studying" , "one reads" , "Scanner" , "Rep rues meeting a reader" , "One examining" .)