As a pupil, you will follow a certain direction (3)
I believe the answer is:
eye
'follow a certain direction' is the definition.
'eye' can be an answer for 'follow' (thesaurus). I am not sure about the 'a certain direction' bit.
'as a pupil you' is the wordplay.
I cannot quite understand how this works, but
'you' could be 'ye' (historical version of 'you') and 'ye' is present in the answer.
A single letter 'e' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
'will' acts as a link.
Can you help me to learn more?
(Other definitions for eye that I've seen before include "Perception" , "study" , "Aim for" , "'Public' or 'private' body part" , "Body organ" .)