U.S. ____ Service (6)
I believe the answer is:
postal
(Other definitions for postal that I've seen before include "Sort of vote" , "Relating to mail delivery" , "To do with snail mail" , "to go so mad in America" , "Relating to mail service" .)
I believe the answer is:
postal
(Other definitions for postal that I've seen before include "Sort of vote" , "Relating to mail delivery" , "To do with snail mail" , "to go so mad in America" , "Relating to mail service" .)