Unaided (5)
I believe the answer is:
alone
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">unaided</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for alone that I've seen before include "Solo" , "Without others being involved" , "With no one to see" , "On one's own" , "Without anybody or anything else" .)