Listens in (10)
I believe the answer is:
eavesdrops
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">listens in</span>' is the definition.<br/ ><span class="explanation-format__explanation">('eavesdrop' can be a synonym of 'listen in')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for eavesdrops that I've seen before include "taps" , "Earwigs" .)