Student at college interrupting short nap (5)
I believe the answer is:
pupil
'student' is the definition.
('pupil' can be a synonym of 'student')
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for pupil that I've seen before include "Learner in the eye?" , "A student at school or eye part" , "that shrinks from brightness" , "Schoolboy or eye part" , "Scholar" .)