Writer, online bully, not quite honest (8)
I believe the answer is:
trollope
'writer' is the definition.
(I know that Trollope is a writer)
'online bully not quite honest' is the wordplay.
'online bully' becomes 'troll' (I am not sure about this - if you are sure you should believe this answer much more).
'not quite' means to remove the last letter (most but not all of the word).
'honest' becomes 'open' (similar in meaning).
'open' with its last letter taken off is 'ope'.
'troll'+'ope'='TROLLOPE'
Can you help me to learn more?
(Other definitions for trollope that I've seen before include "Anthony -, English author (Phineas Finn)" , "Barsetshire novels writer" , "Anthony -, Barchester Towers author" , "Anthony --, English novelist" , "British novelist" .)