The most common and most likely answer to this crossword clue is the 10 letter word TOODLE-PIP
I've seen this crossword clue in The Guardian
T
O
O
D
L
E
-
P
I
P
More clues leading to the result TOODLE-PIP
- Point about much reduced page is so long
- Farewell horrendous lepidoptera — none seen for ages?
- Lackey’s hint for Spooner: ‘I’m going‘
- Goodbye said to old rogue on Tube returning
- Take care of star, unduly led astray at first
- Last word from pilot, dope flying all over the place
- Cheers Spooner’s suggestion for dog breeder
- See you also left record in depression
- S
- Cheers much reduced parking in the end
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-pip.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.