Copper and tin alloy (6)
I believe the answer is:
bronze
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">copper and tin alloy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bronze that I've seen before include "Third prize" , "Hard alloy suitable for casting" , "Third place - alloy" , "Copper and tin alloy - sculpture" , "Tan; metal alloy" .)