One of the Muppets
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">one of the muppets</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for elmo that I've seen before include "Saint whose fire is electric!" , "St ...'s fire, weather phenomenon of coloured glow" , "St ----'s Fire: aura from electrical discharge" , "Fiery saint" , "Saint associated with fire" .)