Hard-Shelled, Spherical Australian Nut
Puzzle 16 of Things to be Grateful For Hard Pack
Question is: Hard-Shelled, Spherical Australian Nut
and the answer is: MACADAMIA
Word Meaning:
MACADAMIA — An evergreen tree, of the genus Macadamia, native to Australia and cultivated in Hawaii.
Definitions from Wiktionary.