Describing a free and easy way to teach a learner (8)
I believe the answer is:
informal
'describing a free and easy way' is the definition.
I can't tell whether this definition defines the answer.
'teach a learner' is the wordplay.
'teach' becomes 'inform' (I am not sure about this - if you are sure you should believe this answer much more).
'learner' becomes 'l' (as in a learner driver with L-plates on their car).
'inform'+'a'+'l'='INFORMAL'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for informal that I've seen before include "Casual or unofficial" , "Casual, free and easy" , "Cosy -- loose" , "Casual, not official" , "If normal, be casual and without ceremony" .)