Attending class, a learner relaxed (8)
I believe the answer is:
informal
'relaxed' is the definition.
(informal can mean relaxed or casual)
'attending class a learner' is the wordplay.
'attending' says to put letters next to each other (to attend can mean to follow).
'class' becomes 'inform' (I can't explain this - if you can you should give a lot more credence to this answer).
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'inform' next to 'a' is 'informa'.
'informa'+'l'='INFORMAL'
Can you help me to learn more?
(Other definitions for informal that I've seen before include "Casual or unofficial" , "Unofficial, relaxed" , "Casual, not official" , "Cosy -- loose" , "Casual and unceremonious" .)