Interrogator (8)
I believe the answer is:
examiner
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">interrogator</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for examiner that I've seen before include "Tester of knowledge" , "Newspaper" , "Assessor" , "Person testing" , "One who tests, inspects or inquires into" .)