like a Wiffle ball (6)
I believe the answer is:
hollow
(Other definitions for hollow that I've seen before include "Not solid, having hole in the middle" , "Empty - hole" , "Empty, not solid" , "Pyrrhic" , "Empty space within" .)
I believe the answer is:
hollow
(Other definitions for hollow that I've seen before include "Not solid, having hole in the middle" , "Empty - hole" , "Empty, not solid" , "Pyrrhic" , "Empty space within" .)