Searcher for minerals (10)
I believe the answer is:
prospector
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">searcher for minerals</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 prospector that I've seen before include "Clementine's father, perhaps?" , "One searching for valuable minerals" , "Searcher for minerals" , "Searcher after valuable ores" , "Gold-digger" .)