Flings with force (6)
'flings with force' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hurls that I've seen before include "Chucks" , "Throws hard" .)
(Other definitions for heaves that I've seen before include "Throws; pulls" , "Gasps; pulls" , "Hoists" .)