Crossword Genius

A large hollow in the ground (6)

Ross

I believe the answer is:

crater

(Other definitions for crater that I've seen before include "Hole left by explosion" , "Bowl-shaped depression" , "Great hole as on top of volcano" , "Hole (on the moon?)" , "Hole formed by impact or explosion" .)

I've seen this clue in the Sydney Morning Herald.
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