Id: sauce listed in Bradford's. Four-letter word meaning to be approved + preposition that equals 'in' + A(merica)
2d - think where a stevedore works, which hopefully will give you a synonym; knock off first letter and you have an Ozzie word for uncultured, boorish.
3d - Def. at the beginning. Relationship is TIE. Ignore 'a' which is superfluous. Word for signal in TIE.
It's quite a tough puzzle, especially the NE