Powder case is neat (7)
I believe the answer is:
compact
This clue is a triple definition!
'powder' is the first definition.
(thesaurus)
'case' is the second definition.
(compact is a kind of case)
'is neat' is the third definition.
(I've seen this before)
(Other definitions for compact that I've seen before include "Agreement - brief" , "Condense" , "Compress; agreement" , "union" , "Dense; powder case" .)