Bomb hole (6)
I believe the answer is:
crater
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bomb hole</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 crater that I've seen before include "Bowl-shaped mouth of volcano" , "Bowl-shaped depression" , "Hole left by bomb" , "big hole" , "Hole (on the moon?)" .)