To fling (4)
I believe the answer is:
toss
'to fling' is the definition.
(I know that fling is the is a more specific form of the action of toss.)
This is all the clue.
(Other definitions for toss that I've seen before include "What to do with a pancake and a caber" , "Raise a bit of money before opening" , "decision-making process" , "Do it with caber in Scotland" , "Throw with a light motion" .)