Overly trusting (5)
I believe the answer is:
naive
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">overly trusting</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for naive that I've seen before include "Lack of experience, innocent" , "Innocently trustful" , "Excessively trusting or innocent" , "Ingenuous and gullible" , "Ingenuous and credulous" .)