1.
Law enforcement agency
13.
Radioer's "Good as done!"
16.
First digital computer
21.
Engine speed, for short
24.
Sumac whose voice covered five octaves
36.
Three hundred to Caesar
38.
Belgian river, a W.W. I battle line
39.
"Für ___" (Beethoven dedication)
47.
Merle Haggard's "___ From Muskogee"
48.
Lemon and lime drinks
58.
Radio station in a 1970 Paul Newman title
59.
One's special person in life
62.
Armenia or Azerbaijan, once: Abbr.