A Collapsed Volcano, Like the Basin at Yellowstone
This page is the CodyCross answer for the clue below from Street Fair, Group 1317, Puzzle 1 (Guest Speakers).
Question is: A Collapsed Volcano, Like the Basin at Yellowstone
and the answer is: CALDERA
Word Meaning:
CALDERA — (volcanology) A large crater formed by collapse of the cone or edifice of a volcano.
Definitions from Wiktionary.