As (5)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">as</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both can mean 'because')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for since that I've seen before include "From that time one" , "Seeing that" , "in the past" , "Because; ago" .)
(Other definitions for such that I've seen before include "So great; of that kind" , "So great (a size)" , "Of the type previously mentioned; so great" , "Of the same kind or degree" .)