Air Hole in the Nose
Puzzle 17 of Alliteration Piece of Cake Pack
Question is: Air Hole in the Nose
and the answer is: NOSTRIL
Word Meaning:
NOSTRIL — Either of the two orifices located on the nose (or on the beak of a bird); used as a passage for air and other gases to travel the nasal passages.
Definitions from Wiktionary.