Copy note containing right answer with student's help (10)
I believe the answer is:
transcribe
'copy' is the definition.
(I've seen this before)
'note containing right answer with student's help' is the wordplay.
'note' becomes 'te' (musical note).
'containing' is an insertion indicator.
'right answer with' becomes 'rans' (I am not sure about this - if you are sure you should believe this answer much more).
'student's help' becomes 'crib' (as in a crib sheet).
'rans'+'crib'='ranscrib'
'te' going around 'ranscrib' is 'TRANSCRIBE'.
(Other definitions for transcribe that I've seen before include "Take down" , "write up" , "Copy out longhand" , "Copy into another form" .)