It's the E in the United Nations' UNEF
This page is the CodyCross answer for the clue below from Deserts of the world, Group 1604, Puzzle 2 (Patagonian).
Question is: It's the E in the United Nations' UNEF
and the answer is: EMERGENCY
Word Meaning:
EMERGENCY — (sometimes attributive) A situation which poses an immediate risk and which requires urgent attention.
Definitions from Wiktionary.