Barbecue rod (4)
'barbecue rod' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for spit that I've seen before include "Rotating cooker" , "Expectorate on the tongue of sand" , "Rotisserie" , "Slaver" , "Eject with violence" .)
(Other definitions for slit that I've seen before include "Narrow straight cut or opening" , "Long narrow cut" , "Narrow rent" , "Narrow aperture" , "Long straight cut" .)