Green’s Dictionary of Slang

steadier n.

(Aus.) in horse-racing, a handicapping weight, thus the handicap itself.

[Aus]S. Aus. Register (Adelaide) 8 May 3/7: At Doncaster, with a steadier of 9 st. 3 lbs., he was beaten a neck by Sneeze for a Handicap Plate.
[Aus]Sydney Morn. Herald 6 May 5/1: Mr. W. Somerville’s blk m Hilda, by Musket from Ouida, with a steadier of 10st., won the Autumn Handicap.
[Aus]Newcastle Sun (NSW) 4 Mar. 2/1: Irish Eyes has been given a steadier of 10.8 in the Welter.
Dly News (Pertrh) 29 June 16/2: With a steadier of 9.0 he ran another great race to score in a fighting finish.
[Aus]Mirror (Perth) 24 Dec. 11/2: Since his return from Sydney the 6-year-old has scored three successive wins and, despite a steadier of 9.5, he looks the safest bet.
[Aus]J. Byrell Lairs, Urgers & Coat-Tuggers 268: And, but for a badly split heel, he’d have carried the steadier of 10 st to victory in the ‘89 Cup.