The most common and most likely answer to this crossword clue is the 4 letter word KING
I've seen this crossword clue in The Times
K
I
N
G
More clues leading to the result KING
- Man that’s checked stock in grocery stores
- Huge college studies spoken of
- Family joined by grand royal personage
- Blood? Good Lord
- Ruler good, following relations
- Ruler, to some extent, back in geometry
- Buried in car park – inglorious location for one such as 22 the 3, the 1a/28a
- Ruler’s metric measure spanning an imperial one
- Requesting to put away a second piece
- Top guy, Ali departs African capital having shut up Foreman, finally
Buddy explains!

The straight part
We know that "royal personage" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case royal personage = king.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 KING mean?
KING noun- A male monarch; a man who heads a monarchy. If it's an absolute monarchy, then he is the supreme ruler of his nation.
- A powerful or majorly influential person.
- Something that has a preeminent position.
- A component of certain games.
- A king skin.
- A male dragonfly; a drake.
- A king-sized bed.
- A male person.
- To crown king, to make (a person) king.
- To rule over as king.
- To perform the duties of a king.
- To assume or pretend preeminence (over); to lord it over.
- To promote a piece of draughts/checkers that has traversed the board to the opposite side, that piece subsequently being permitted to move backwards as well as forwards.
- To dress and perform as a drag king.
- A sounding stone, a Chinese musical instrument.