Being a bit rude to a couple of learners brings depression (4)
I believe the answer is:
dell
'depression' is the definition.
(dell is a kind of depression)
'being a bit rude to a couple of learners' is the wordplay.
I cannot really see how this works, but
'learners' could be 'll' (the abbreviation for learner driver written twice) and 'll' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'brings' acts as a link.
Can you help me to learn more?
(Other definitions for dell that I've seen before include "Small wooded hollow or valley" , "Farmer's place, in song" , "Dingle" , "Dingley - - , ('Pickwick Papers')" , "Little wooded hollow" .)