The most common and most likely answer to this crossword clue is the 5 plus 4 letter word COURT CARD
I've seen this crossword clue in The Sunday Telegraph
C
O
U
R
T
C
A
R
D
More clues leading to the result COURT CARD
- See eccentric king, perhaps?
- Jack maybe to ask for comb
- Curry favour with eccentric queen, perhaps
- Elevated club, maybe, to seek character
- King, say, to go out with queen in rascal’s clutches
- King or queen, say — or royal jester?
- Try to catch eccentric knave perhaps
- Reportedly, arrested character is the king, perhaps?
- Royal jester — one of three in a suit
Buddy explains!

The straight part
We know that "King or queen, say" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case king or queen, say = court card.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.