One in the eye for the student? (5)
I believe the answer is:
pupil
I believe this is a double definition.
'one in the eye' is the first definition.
('pupil' is part of 'eye')
'the student?' is the second definition.
(pupil can mean a student at a school)
'for' acts as a link.
(Other definitions for pupil that I've seen before include "School learner" , "Eye's centre" , "Centre of iris, in the eye" , "Learner at educational institution" , "I learn" .)