The most common and most likely answer to this crossword clue is the 12 letter word PRECOGNITIVE
P
R
E
C
O
G
N
I
T
I
V
E
Buddy explains!
The straight part
We know that "Clairvoyant" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case clairvoyant = precognitive.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 PRECOGNITIVE mean?
PRECOGNITIVE noun- A precognitive person, a seer.
- Pertaining to the ability to see or predict future events.