Bursting (8)
I believe the answer is:
erupting
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bursting</span>' is the definition.<br/ ><span class="explanation-format__explanation">(erupting is a kind of bursting)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for erupting that I've seen before include "Bursting out suddenly" , "Coming out" .)