The most common and most likely answer to this crossword clue is the 10 letter word METHODICAL
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More clues leading to the result METHODICAL
Buddy explains!

The straight part
We know that "Organised" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case organised = methodical.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 METHODICAL mean?
METHODICAL adjective- In an organized manner; proceeding with regard to method; systematic.
- Arranged with regard to method; disposed in a suitable manner, or in a manner to illustrate a subject, or to facilitate practical observation.