The most common and most likely answer to this crossword clue is the 6 letter word PEARLY
I've seen this crossword clue in The Times
P
E
A
R
L
Y
More clues leading to the result PEARLY
- Costermonger beginning to peddle with the larks?
- Like some kings to take power ahead of time
- Smooth and tough Arctic explorer saving lives, originally
- Like some kings and queens having power advanced
- Prince soon begemmed
- Come out again and gather fruit
- Parking in good time to reach such gates, one’ll be late
Buddy explains!

The straight part
We know that "Like some kings" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case like some kings = pearly.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 PEARLY mean?
PEARLY noun- A pale greyish white colour, tinted with blue.
- (especially in plural) A tooth.
- Of a pale greyish white colour, tinted with blue.
- Resembling or characteristic of a pearl; nacreous.
- Containing or yielding pearls.
- Having a pure sweet tone.