Chuck, fling (4)
I believe the answer is:
toss
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">chuck</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">fling</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(tossing is a kind of flinging)</span><br/ ><br/ ></span>
(Other definitions for toss that I've seen before include "Spin of a coin" , "Fling" , "Heads or tails throw" , "ball" , "Careless not to give this" .)