Tidy, clean (4)
I believe the answer is:
neat
I believe this clue is a double definition.
'tidy' is the first definition.
(similar in meaning)
'clean' is the second definition.
(I know that clean can be written as neat)
(Other definitions for neat that I've seen before include "Very good American" , "Tidy, well-organised" , "Bovine animal" , "Tidy and spruce" , "farm animals" .)