The most common and most likely answer to this crossword clue is the 8 letter word TIDINESS
I've seen this crossword clue in The Sunday Telegraph
T
I
D
I
N
E
S
S
More clues leading to the result TIDINESS
- No disorder, doctor insisted
- Order put out – I dissent
- Worried, insisted on order
- Order son to follow obligations, restricting noise
- Cook insisted it means keeping things in order
- Order insisted – a good order
- Order? I dissent, being awkward
- Papers in sets in different order
- Insisted on getting amended order
- Order in diets on the first of September? Good order
Buddy explains!

The straight part
We know that "order" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case order = tidiness.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 TIDINESS mean?
TIDINESS noun- The quality of being tidy.