The most common and most likely answer to this crossword clue is the 6 letter word RIGHTO
I've seen this crossword clue in Financial Times
R
I
G
H
T
O
More clues leading to the result RIGHTO
- Fine South coast resort neither opens nor closes
- Apart from the outskirts, south coast town is fine
- Removing shell from Sussex beach is OK
- Fine English seaside resort out of bounds
- Fine doctor for nursing hospital
- Not quite in line with the latest ideas, okay?
- Fine south coast resort out of bounds?
- Very good south coast resort out of bounds
- Politically correct but pointless, OK?
- Understood True Love
Buddy explains!

The straight part
We know that "Understood" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case understood = righto.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 RIGHTO mean?
RIGHTO interjection- Okay; all right.