Aged in ebony initially - it's probably a goodie (5)
I believe the answer is:
oldie
'probably a goodie' is the definition.
I can't judge whether this defines the answer.
'aged in ebony initially' is the wordplay.
'aged' becomes 'old' (similar in meaning).
'initially' suggests taking the first letters.
The first letters of 'in ebony' is 'ie'.
'old'+'ie'='OLDIE'
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for oldie that I've seen before include "Veteran" , "One getting on" , "pensioner" , "Aged person or thing" , "Still popular hit" .)