Lying in wait (7)
I believe the answer is:
lurking
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lying in wait</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for lurking that I've seen before include "In hiding for ambush" , "Lying hidden in ambush" , "Lying in wait, ready to ambush perhaps" , "Lying in wait, to ambush say" , "Waiting in ambush" .)