Pupil needing job that pays after end of school (7)
I believe the answer is:
learner
'pupil' is the definition.
(I know that learner is a type of pupil)
'job that pays after end of school' is the wordplay.
'job that pays' becomes 'earner' (term for a job which lets someone earn good money).
'after' says to put letters next to each other.
'end of' indicates one should take the final letters.
The final letter of 'school' is 'l'.
'earner' put after 'l' is 'LEARNER'.
'needing' is the link.
(Other definitions for learner that I've seen before include "10 [STUDENT], possibly 11 [BOOKISH]" , "Disciple" , "He displays the L-plate" , "Someone undergoing education" , "One gaining knowledge" .)