Batsman (6)
I believe the answer is:
opener
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">batsman</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 opener that I've seen before include "device for getting at the drink" , "No.1 or No.2 bat" , "A key or a bottle top remover" , "Can cutter" , "For a start" .)