The most common and most likely answer to this crossword clue is the 1 plus 10 letter word A POSTERIORI
I've seen this crossword clue in The Times
A
P
O
S
T
E
R
I
O
R
I
More clues leading to the result A POSTERIORI
- Bill must have perfect gold edging, I learnt from experience
- A stern Head of Inspectorate using evidence
- Seat must have top class cover — a logical way to think
- What’s excellent about seat is discovered from experience
- . Justification requiring more than just reasoning?
- Artificial intelligence to cover the seat was derived from observed facts
- Empirical operator is represented by imaginary number
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.