Divide pupils as term breaks up (6)
I believe the answer is:
'divide pupils' is the definition.
'stream' can be an answer for 'pupils' (stream can mean a class of similarly able pupils). I am not sure about the 'divide' bit.
'as term breaks up' is the wordplay.
'breaks up' indicates anagramming the letters.
'asterm' anagrammed gives 'STREAM'.
Can you help me to learn more?
(Other definitions for stream that I've seen before include "Steady flow; pupil group" , "Flow of water on land" , "Flow from master" , "Master of a tributary" , "group of schoolchildren" .)