"Rockin' in the ___ World," 1989 song by Neil Young

Understand, as a joke3 Oxygen or neon, e.g.3 Actor Omar of "House"4 Dallas Cowboys or L.A. Lakers, e.g.4 Tear, like a cloth3 "___ Old Flag," 1974 song by Johnny Cash about the United States6 Down with a bug3 Robert Frost or Maya Angelou, e.g.4