Steal a look
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">steal a look</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 peek that I've seen before include "Glimpse" , "Secret look" , "spy" , "Quick, sly look" , "Take brief or surreptitious look" .)