The most common and most likely answer to this crossword clue is the 16 letter word BLUEÂ SUEDEÂ SHOES
B
L
U
E
Â
S
U
E
D
E
Â
S
H
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E
S
Buddy explains!
The straight part
We know that "the King’s number" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case the king’s number = blue suede shoes.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.