Be afraid of (4)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">be afraid of</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fear that I've seen before include "Apprehension" , "Terror" , "Dread, alarm" , "Dread, great anxiety" , "Trepidation" .)