Termite (5)
(Other definitions for borer that I've seen before include "Drill" , "Uninteresting type of" , "Hole-making worm or insect" , "Tunnelling worm or insect" , "Insect tunnelling into plant" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">termite</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 ant that I've seen before include "A soldier, for one" , "maybe in hill" , "one living in colonies" , "Termite" , "Six-footer" .)