Green’s Dictionary of Slang

(Aus.) to hand over.

1906		Sun. Times (Perth) 4 Mar. 1/1: A Midlands workshops employee is a rook of the first water [...] he gives his creditors impossible reasons for not sparring up.
1910		Truth (Perth) 1 Oct. 4/7: When you hear ‘Lor strike me blue, / Don’t you think it’s up to you / To spar up a shick or two?’ / You’ll be right.
1936		‘Banjo’ Paterson Shearer’s Colt 166: Tell ’im to spar up with the money or we’ll go to the Jockey Club and call the Baronite and the Marquis to give evidence.