Cavity (4)
'cavity' is the definition.
(hole is a kind of cavity)
This is all the clue.
(Other definitions for hole that I've seen before include "depression" , "Hollow, cavity" , "Awkward situation" , "Aperture; flaw in a plan" , "Empty space; aperture" .)
'cavity' is the definition.
(I know that chamber is a type of cavity)
This is all the clue.
(Other definitions for chamber that I've seen before include "in which to get the bullet?" , "Judge's room" , "A house of parliament" , "vault" , "Large room" .)
'cavity' is the definition.
(nasal cavity is a kind of cavity)
This is the entire clue.
(Other definitions for nasal that I've seen before include "pinched" , "nosy?" , "of a prominent feature" , "Part of helmet" , "Relating to the nose" .)