Pilot’s emergency device (7,4)
I believe the answer is:
ejector seat
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pilot's emergency device</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 ejector seat that I've seen before include "form of escape" , "It throws pilot to safety" , "Pilot's emergency device" , "Warplane escape mechanism" , "Device for a pilot who wants to depart quickly!" .)