Discover nonsense writer's first bit of nonsense (5)
I believe the answer is:
learn
'discover' is the definition.
(I know that discover is a more specific form of discover)
'nonsense writer's first bit of nonsense' is the wordplay.
'nonsense writer' becomes 'lear' (I have seen 'comic writer' mean 'lear' so perhaps 'writer' could also mean 'lear'. I am not sure about the 'nonsense' bit.).
'first bit of nonsense' becomes 'n' (lst letter of 'nonsense').
'lear'+'n'='LEARN'
Can you help me to learn more?
(Other definitions for learn that I've seen before include "Hear - memorise" , "Acquire information" , "Commit to memory" , "Study or digest" , "Study - find out" .)