Little piece by hack accepted by editor for Oldie (10)

I believe the answer is:

whitebeard

I'm a little stuck... Click here to teach me more about this clue!

'oldie' is the definition.
Both the answer and definition are singular nouns.
Perhaps they are linked in a way I don't understand?

'little piece by hack accepted by editor' is the wordplay.
'little piece' becomes 'whit' (I can't explain this - if you can you should give a lot more credence to this answer).
'by' is a charade indicator (letters next to each other).
'hack' becomes 'bear' (both can mean to be able to tolerate or stand).
'accepted by' indicates putting letters inside.
'editor' becomes 'ed'.
'bear' put within 'ed' is 'ebeard'.
'whit'+'ebeard'='WHITEBEARD'

'for' acts as a link.

Can you help me to learn more?

I've seen this clue in The Telegraph.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.