Having a metal coating (6)
I believe the answer is:
plated
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">having a metal coating</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 plated that I've seen before include "Given a metal coating" , "Thinly coated with deposited metal" .)