Cool road rebuilt in America
I believe the answer is:
colorado
'in america' is the definition.
('Colorado' is part of 'america')
'cool road rebuilt' is the wordplay.
'rebuilt' indicates anagramming the letters.
'cool'+'road'='coolroad'
'coolroad' anagrammed gives 'COLORADO'.
(Other definitions for colorado that I've seen before include "US state, capital Denver" , "American river" , "American state, capital Denver" , "in America?" , "Boulder's state" .)