Vanished Into __, Suddenly Disappeared

This page is the CodyCross answer for the clue below from Mesopotamia, Group 971, Puzzle 3 (Reed Industries).

Question is: Vanished Into __, Suddenly Disappeared

and the answer is: THINAIR

Word Meaning:

THIN AIR — (idiomatic, figuratively, usually humorous) An unknown location; (by extension) apparent disappearance or nonexistence.

Definitions from Wiktionary.