School mark or rating (5)
I believe the answer is:
grade
I believe this clue is a double definition.
'school mark' is the first definition.
(I've seen this before)
'rating' is the second definition.
(I know that rating can be written as grade)
(Other definitions for grade that I've seen before include "Rank or status" , "School mark" , "one of the entertainment moguls" , "Particular level of rank, quality, etc" , "Degree" .)