Concerned with new student's course (9)
I believe the answer is:
refresher
'course' is the definition.
(I know that refresher is a type of course)
'concerned with new student's' is the wordplay.
'concerned with' becomes 're' (re can mean regarding or about).
'new student' becomes 'fresher' (I've seen this before).
're'+'fresher'='REFRESHER'
(Other definitions for refresher that I've seen before include "This reinvigorates" , "drink" , "Top-up course" , "Follow-up course; extra fee in long court case" , "Sort of course" .)