Tidy or carefully arranged (4)
I believe the answer is:
neat
I believe this clue is a double definition.
'tidy' is the first definition.
(synonyms)
'carefully arranged' is the second definition.
(I've seen this in another clue)
(Other definitions for neat that I've seen before include "beef" , "descendant of 19 [AUROCHS]" , "Pure" , "well-kept" , "lacking water" .)