Home to Acadia National Park (5)
I believe the answer is:
maine
'home to acadia national park' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for maine that I've seen before include "The USA's Pine Tree State" , "US state, capital Augusta (5)" , "New England state" , "American state, capital Augusta" , "NE US state" .)