Leer at (4)
I believe the answer is:
ogle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">leer at</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ogle that I've seen before include "flirtatious look" , "Stare at in a lecherous manner" , "Gawp" , "Perv" , "Eye flirtatiously" .)