Needing immediate action (6)
I believe the answer is:
urgent
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">needing immediate action</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for urgent that I've seen before include "Pressing, important" , "Important and in a hurry" , "grave?" , "Pressing, burning" , "Needing immediate attention, don't delay" .)