The most common and most likely answer to this crossword clue is the 11 letter word DING-A-LING
I've seen this crossword clue in The Guardian
D
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More clues leading to the result DING-A-LING
Buddy explains!

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 DING-A-LING mean?
DING-A-LING noun- The sound of a small bell; the sound of a fire engine bell.
- An eccentric or crazy person.
- The penis.