The most common and most likely answer to this crossword clue is the 9 letter word TOODLE-OO
I've seen this crossword clue in Financial Times
T
O
O
D
L
E
-
O
O
More clues leading to the result TOODLE-OO
- So long, as well, endless strips of pasta consumed
- I'm going to impersonate flipping lion and duck!
- I’m going to dole out eggs
- Besides catching plenty, Evans ultimately conceded bye
- 1 down also led astray over and over again
- Overly embracing most of masses in farewell
- Divers to do sign need oxygen for so long
- Goodbye to old lion in party
Buddy explains!
The straight part
We know that "I’m going" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case i’m going = toodle-oo.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.
Crossword Answer definitions
TOODLE-OO interjection- Goodbye, farewell, see you soon