Neat, I agree (4,2)
I believe the answer is:
just so
This clue is a double definition.
'neat' is the first definition.
'i agree' is the second definition.
(both are ways of concurring with a statement)
(Other definitions for just so that I've seen before include "Carefully arranged" , "Exactly right" , "Carefully planned" , "Perfectly" , "Spot on" .)