At risk (10)
I believe the answer is:
vulnerable
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">at risk</span>' is the definition.<br/ ><span class="explanation-format__explanation">(something at risk is vulnerable or in danger)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for vulnerable that I've seen before include "Susceptible" , "Exposed" .)