SOLUTION 672:

ACROSS 7 Spinning wheel, 8 Fifty-two, 9 Rare, 10 Top Hat, 12 Ottawa, 14 Asylum, 16 Yuppie, 18 Burr, 20 Reveille, 22 Mad Cow Disease.

DOWN 1 Apricots, 2 Snatch, 3 Mitt, 4 Agronomy, 5 Thirst, 6Bear, 11 Tom Brown, 13 Whiplash, 15 Lyrics, 17 Privet, 19 Utah, 21 Vein.