Proterozoic, for one

EON

"Here’s a helpful hint for the clue "Proterozoic, for one": "A vast span of geological time, like the Phanerozoic or Archean." This hint: - Nudges the solver toward thinking about geological time divisions. - Mentions other examples (Phanerozoic, Archean) to help them recall the broader category. - Avoids repeating the original clue or giving away the answer directly."

The clue "Proterozoic, for one" leads to the answer "EON" through the following reasoning: 1. Definition Connection: The Proterozoic is a geological eon, one of the major divisions of Earth's history. The clue uses "for one" to indicate that "Proterozoic" is an example of the answer. 2.