Green’s Dictionary of Slang

1. civilly, politely.

1842

Egan ‘The Bridle Cull’ in Farmer Musa Pedestris (1896) 140: Then patter to all spicey, and tip ’em lots of fun, / And blunt you’ll never want while you’ve got a pop-gun.

2. fashionably, smartly.

1839		Crim.-Con. Gaz. 10 Aug. 259/1: I saw George Crow [...] togged out spicey.
1913		Truth (Sydney) 23 Feb. 5/1: If you had seen ’em strolling / Got up spicey, span, and spick.