Drilled (5)
I believe the answer is:
bored
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">drilled</span>' is the definition.<br/ ><span class="explanation-format__explanation">('bore' can be a synonym of 'drill')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for bored that I've seen before include "Drilled; wearied" , "Drilled (a hole)" , "Suffering from ennui" , "Tired and uninterested" , "Unstimulated" .)