Get wiser, supposedly (3)

I believe the answer is:

age

(Other definitions for age that I've seen before include "Period piece" , "16/18 [INDUSTRIAL REVOLUTION]" , "Historic period" , "Long period" , "Period of history" .)

I've seen this clue in The New York Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.