Assumed command (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">assumed command</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for led that I've seen before include "Paved the way" , "Light-emitting diode (abbr.)" , "Emitter of light" , "Something emitting light" , "Guided; small light" .)