Don't quit (4)
(Other definitions for goon that I've seen before include "someone rather stupid" , "Silly person - bully (US)" , "Stupid person" , "Hired thug" , "Sellers for example" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">don't quit</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for stay on that I've seen before include "Remain after others have left" , "Remain after normal time" , "Remain behind" , "stick" .)