The most common and most likely answer to this crossword clue is the 15 letter word NOTWITHSTANDING
I've seen this crossword clue in Independent
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More clues leading to the result NOTWITHSTANDING
- Even if smart, also into stupid things
- No fool, Henry has status still
- In spite of entanglement, spoken of with repute
- I don’t want things disturbed yet
- Heavyweight’s up on his feet and punching still
- Lacking reputation despite anything to the contrary
- Still without being still
- Despite reputation, getting behind idiot in drama
- Yet this is how all-seater stadiums are
- Despite having to sit, presumably?
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 NOTWITHSTANDING mean?
NOTWITHSTANDING noun- An instance of the word "notwithstanding", often characteristic of legalese.
- Nevertheless, all the same.
- In spite of, despite.
- Although.