Liable (3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">liable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for apt that I've seen before include "Fit, suitable" , "Train" , "Fitting - inclined" , "Suitable; quick to learn" , "Pertinent" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">liable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both can mean having a tendency for something)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for prone that I've seen before include "Liable (to suffer) - lying down" , "Lying face down or likely to do something" , "Given" , "Recumbent, likely" , "Lying flat" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">liable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>