Prime number (6)

I think it could be either:

Which length description are you looking for?:

eleven

'prime number' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for eleven that I've seen before include "Number, on a team perhaps" , "Prime number" , "Not first team (6,6) - See 24" , "Late" , "Cardinal" .)

I've seen this clue in The Times and The Telegraph.

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.