24a A legal certificate of indebtedness (9) d?b?n???
17d In mathematics, one of the positive or negative numbers 1,2,3, etc., or zero. (8)
Thanking you
Thank you my friends, sorry I had no letters for 17d when I posted,
Integers fits lovely.
this is a stinker this week and they have made a mistake with 5d & 10a