Legal fee is concerning new student (9)
I believe the answer is:
refresher
'legal fee' is the definition.
(refresher is a kind of legal fee)
'concerning new student' is the wordplay.
'concerning' becomes 're'.
'new student' becomes 'fresher' (I've seen this before).
're'+'fresher'='REFRESHER'
'is' is the link.
(Other definitions for refresher that I've seen before include "Follow-up course; extra fee in long court case" , "Sort of course" , "course of sorts" , "one kind of course" , "drink" .)