Neat, in order (4)
I believe the answer is:
tidy
I believe this clue is a double definition.
'neat' is the first definition.
(synonyms)
'in order' is the second definition.
(synonyms)
(Other definitions for tidy that I've seen before include "Well-groomed" , "Clear up" , "Shipshape" , "Uncluttered" , "Neaten" .)