Miner (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">miner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(collier is a kind of miner)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for collier that I've seen before include "Miner; coal ship" , "Geordie Jack, commonly" , "Ship carrying coal" , "Painter" , "unable to avoid contact with mine" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">miner</span>' is the definition.<br/ ><span class="explanation-format__explanation">(pitman is a kind of miner)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pitman that I've seen before include "Miner" , "Mine host perhaps" , "Mine worker" , "Racehorse trainer" .)