Throw with great effort — retch (5)
I believe the answer is:
heave
This clue is a double definition.
'throw with great effort' is the first definition.
(I've seen this in another clue)
'retch' is the second definition.
(I know that retch can be written as heave)
(Other definitions for heave that I've seen before include "Drag" , "Retch - lift using much effort" , "Express" , "Hoist" , "Be sick; rise and fall" .)