Talked originally about a certain prize (8)
I believe the answer is:
treasure
'prize' is the definition.
('treasure' can be a synonym of 'prize')
'talked originally about a certain' is the wordplay.
'originally' indicates taking the first letters.
'about' becomes 'rea' (I've seen this in other clues**).
'a certain' becomes 'sure' (I've seen this before).
The initial letter of 'talked' is 't'.
't'+'rea'+'sure'='TREASURE'
(Other definitions for treasure that I've seen before include "Jewel hoard" , "Hold dearly, like buried gold etc" , "A quantity of valuable objects" , "Book by Stevenson" , "Wealth and riches" .)