Gold brick (5)
I believe the answer is:
ingot
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gold brick</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ingot that I've seen before include "Precious metal bar" , "Pig" , "A brick shaped lump of gold" , "Form of gold or silver" , "valuable block" .)