Grow old (3)

I think it could be either:

Which length description are you looking for?:

3,2

get on

'grow old' is the definition.
(thesaurus)

This is all the clue.

(Other definitions for get on that I've seen before include "Make progress or mount up" , "Make progress or advance in age" , "Age; prosper" , "Board - prosper" , "Make progress or climb aboard" .)

I've seen this clue in The Independent and 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.