The most common and most likely answer to this crossword clue is the 6 letter word PALACE
I've seen this crossword clue in The Times
P
A
L
A
C
E
More clues leading to the result PALACE
- Seat outside American mansion
- Site incorporating a luxurious dwelling
- Football team in China excellent
- China has fantastic residence for ruler maybe
- Put round a large and splendid house
- Residence of royal friend, superb
- Location housing a royal building
- Step outside a large royal residence
- Personal assistant gets fine fabric for grand house
- Site around area in Kensington, for one
Buddy explains!

The straight part
We know that "residence for ruler maybe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case residence for ruler maybe = palace.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 PALACE mean?
PALACE noun- Official residence of a head of state or other dignitary, especially in a monarchical or imperial governmental system.
- A large and lavishly ornate residence.
- A large, ornate public building used for entertainment or exhibitions.
- To decorate or ornate.