Profited from period in prison - got through a year's stretch in 11 months

I believe the answer is:

gainedtime

I'm a little stuck... Click here to teach me more about this clue!

I've seen this clue in the Irish 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.