Chucks (6)
(Other definitions for tosses that I've seen before include "Throws in the air, maybe salad" , "flips in the air,salad or coin" , "Throws carelessly" , "Throws, coin say" , "Throws up, perhaps salad" .)
'chucks' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for throws that I've seen before include "Propels through the air" , "Casts or hurls" , "Hurls, flings" , "Chucks" .)
(Other definitions for slings that I've seen before include "Looped bandages for limb support or missile throwers" , "'''... to suffer the ... and arrows of outrageous fortune'' (Hamlet) (6)'" , "Supporters" , "Arm bandages; drinks" , "Catapults or arm supports" .)