No one listened to her about fool and artist (9)
I believe the answer is:
cassandra
'no one listened to her' is the definition.
I can't tell whether this definition defines the answer.
'fool and artist' is the wordplay.
'fool' becomes 'cass' (I can't justify this - if you can you should give a lot more credence to this answer).
'artist' becomes 'ra' (Royal Academician, member of Royal Academy of Arts).
'cass'+'and'+'ra'='CASSANDRA'
'about' acts as a link.
Can you help me to learn more?
(Other definitions for cassandra that I've seen before include "forecaster" , "Crass Dana as gloomy prophetess" , "Unheeded prophetess" , "one having gloomy views" , "Jane's sister" .)