Range of knowledge (3)
I believe the answer is:
ken
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">range of knowledge</span>' is the definition.<br/ ><span class="explanation-format__explanation">(ken can mean someone's range of knowledge)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ken that I've seen before include "Know; man's name" , "Notice" , "Awareness" , "Understanding - boy's name" , "One's range of knowledge" .)