Speleologist (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">speleologist</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 caver that I've seen before include "Underground explorer" , "Speleologist" , "Potholer" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">speleologist</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for potholer that I've seen before include "Explorer of underground caves" , "Speleologist" , "Caver" .)