The most common and most likely answer to this crossword clue is the 4 letter word DODO
I've seen this crossword clue in Financial Times
D
O
D
O
More clues leading to the result DODO
- One party after another for old bird
- Remarkably odd, old old bird
- Party repeatedly gets the bird — dead long ago
- Twice cook dead bird
- Repeatedly rip off Charlie
- Repeatedly imitate bird once
- Grounded bird no longer parties
- Two parties, one completely dead?
- Cook complete bird that’s long dead
- Two parties that never got off the ground?
Buddy explains!

The straight part
We know that "E bird" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case e bird = dodo.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DODO mean?
DODO noun- A large, flightless bird, †Raphus cucullatus, related to the pigeon, that is now extinct (since the 1600s) and was native to Mauritius.
- A person or organisation which is very old or has very old-fashioned views or is not willing to change and adapt.
- Fried plantain.