By means of (7)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">by means of</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 through that I've seen before include "From beginning to end" , "By means of, via" , "clear" , "Non-stop - finished" , "Using" .)
(Other definitions for open that I've seen before include "Exposed to the air" , "Overt" , "Allowing access" , "Agape" , "Liberal" .)