Eiffel Tower's composition
I believe the answer is:
iron
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">eiffel tower's composition</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 iron that I've seen before include "Metal (that may be pumped?)" , "medicinal preparation for the anaemic?" , "Revolver" , "Club; element" , "See 14" .)