The most common and most likely answer to this crossword clue is the 14 letter word AFOREMENTIONED
I've seen this crossword clue in Financial Times
A
F
O
R
E
M
E
N
T
I
O
N
E
D
More clues leading to the result AFOREMENTIONED
- Previously cited supervisors entering sadly on a diet
- Bad idea not bringing in supervisors earlier
- Dealt with team leaders replacing chapter already introduced
- Above supervisors, I note, revelling in promotion
- On a diet, perhaps, including those in charge above
- Idea not supposed to impress supervisors, alluded to previously
- Previously referred to supervisors in a note I’d composed
- Previously referred to a figure heard and acknowledged
- A quartet guys steered clear of, I say
- Bosses introduced to fresh idea not previously communicated
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 AFOREMENTIONED mean?
AFOREMENTIONED noun- The one or ones mentioned previously.
- Previously mentioned.