Better green salad in the east part of Massachusetts (4,3)
I believe the answer is:
cape cod
'part of massachusetts' is the definition.
(I've seen this before)
'better green salad in the east' is the wordplay.
'better' becomes 'cap' (I've seen this before).
'green' becomes 'eco' (abbreviation for ecological).
'salad in the east' becomes 'd' (I can't justify this - if you can you should believe this answer much more).
'cap'+'eco'+'d'='CAPE COD'
Can you help me to learn more?
(Other definitions for cape cod that I've seen before include "part of New England?" , "New England promontory" , "part of Massachusetts" , "Headgear" , "US peninsula" .)