Coal miner (7)
I believe the answer is:
collier
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">coal miner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for collier that I've seen before include "Cargo ship" , "He works in a coal mine" , "unable to avoid contact with mine" , "Ship carrying coal" , "Worker down under" .)