Green’s Dictionary of Slang

spell (for) v.

[SE spell, to engage in study or contemplation of something]

1. to long for.

[UK]W. Combe Doctor Syntax, Wife (1868) 320/1: Syntax, with native keeness felt / At what the cunning tradesman spelt.
[UK]Hotten Dict. of Modern Sl. etc. (2nd edn).
[UK]Sl. Dict.
[UK]Barrère & Leland Dict. of Sl., Jargon and Cant.

2. (W.I.) to wait for, with the intention of attacking verbally or physically.

[WI]Allsopp Dict. Carib. Eng. Usage.

3. (US) to take over, to relieve.

[US]A.I. Bezzerides Thieves’ Market 115: Jesus Christ, I spelled you, didn’t I? I took the wheel when you was tired.