Let a student know without ceremony? (8)
I believe the answer is:
informal
'without ceremony?' is the definition.
(I've seen this before)
'let a student' is the wordplay.
'let' becomes 'inform' (I can't explain this - if you can you should give a lot more credence to this answer).
'student' becomes 'l' (as in L-plates for learner drivers).
'inform'+'a'+'l'='INFORMAL'
'know' is the link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for informal that I've seen before include "Casual, not official" , "Casual, free and easy" , "Casual or unofficial" , "Unofficial, relaxed" , "If normal, be casual and without ceremony" .)