Emergency worker (7)
I believe the answer is:
fireman
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">emergency worker</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fireman that I've seen before include "he puts out at work" , "who does a rushed job on tender?" , "Railway driver's assistant" , "Conflagration fighter" , "Locomotive stoker" .)