Monopoly token retired in 2013 (4)
I believe the answer is:
iron
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">monopoly token retired in 2013</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 "Metallic chemical element" , "Club to smooth the cloth" , "Decrease" , "Heavy metallic element" , "Smooth; element" .)