Fed up with education after exam (5)
I believe the answer is:
sated
'fed up' is the definition.
(I've seen this before)
'education after exam' is the wordplay.
'education' becomes 'ed' (abbreviation - e.g. sex ed).
'after' means one lot of letters go next to another.
'exam' becomes 'SAT' (standard attainment test, UK exam).
'ed' put after 'sat' is 'SATED'.
'with' acts as a link.
(Other definitions for sated that I've seen before include "Indulged to the full" , "Fully satisfied" , "Stuffed with dates" , "Stuffed, having eaten to the full" , "Stuffed, having had a surfeit" .)