Crossword Genius

Period of one's greatest productivity (6)

Ross

I believe the answer is:

heyday

'period of one's greatest productivity' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for heyday that I've seen before include "Highest period in someone's career" , "golden age" , "Period of greatest success and popularity" , "Period of greatest vigour" , "Prime time?" .)

I've seen this clue in The Guardian.
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.