Crossword Genius

Vast and hollow (9)

Ross

I believe the answer is:

cavernous

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">vast and hollow</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>

(Other definitions for cavernous that I've seen before include "like a big pit" , "Roomy" , "of large underground chambers" , "Gaping" .)

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