Distrustful (10)
(Other definitions for suspicious that I've seen before include "Dodgy" , "Shady; untrusting" , "open to doubt" , "questionable" , "Showing distrust" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">distrustful</span>' is the definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for leery that I've seen before include "Cautious due to suspicions" , "Shy" , "Knowing" , "Suspiciously cautious" , "Cunning - wary" .)