Mostly talk about plate thrown in Athens? (6)
I believe the answer is:
discus
'plate thrown in athens?' is the definition.
I can't judge whether this defines the answer.
'mostly talk' is the wordplay.
'mostly' means to remove the last letter (most but not all of the word).
'talk' becomes 'discuss' (I've seen this before).
'discuss' with its final letter removed is 'DISCUS'.
'about' is the link.
Can you help me to learn more?
(Other definitions for discus that I've seen before include "missile launched" , "Throwing plate" , "Field sport" , "Something thrown by athletes" , "Object thrown by athletes" .)