Copper and zinc alloy (5)
I believe the answer is:
brass
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">copper and zinc alloy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for brass that I've seen before include "Instruments, alloy" , "Metal alloy" , "Zinc-copper alloy - cheek" , "An alloy; part of orchestra" , "Family of wind instruments" .)