The most common and most likely answer to this crossword clue is the 6 letter word PROPER
I've seen this crossword clue in The Guardian
P
R
O
P
E
R
More clues leading to the result PROPER
- Decorous publicity about string of pearls, perhaps
- Right argument in favour for each
- Moral support needed by one who reigns
- Right to support the monarch
- Suitable for salesperson after retirement
- To support monarch is correct
- Correct project given change of direction at the end
- Do well without having succeeded in conforming to accepted norms
- Guy in spin? That’s correct
- Suitable publicity precedes short musical entertainment
Buddy explains!

The straight part
We know that "correct" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case correct = proper.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 PROPER mean?
PROPER noun- Something set apart for a special use.
- (heading) Suitable.
- (heading) Possessed, related.
- (heading) Accurate, strictly applied.
- Properly; thoroughly; completely.
- Properly.