Disorderly, messy (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
untidy
I believe this is a double definition.
'disorderly' is the first definition.
(similar in meaning)
'messy' is the second definition.
(synonyms)
(Other definitions for untidy that I've seen before include "Not neat or orderly" , "Not neatly arranged" , "Careless, messy" , "Disorderly, messy" , "missing order" .)