Handheld firework (8)
I believe the answer is:
sparkler
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">handheld firework</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 sparkler that I've seen before include "Eg, a diamond" , "Firework - precious stone" , "Bright gem" , "Possibly brilliant" , "Slow-burning firework and a diamond" .)