Fizzled out (4)
I believe the answer is:
died
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fizzled out</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 died that I've seen before include "Passed away" , "Stopped living" , "Ceased to live" , "Ceased to exist" , "faded" .)