Last two.
10a A fraction to one side ??a?t. Looks like slant which would be to one side but can't see the relevance to fraction.
1d Talk about capacity. C???. (if slant is correct , third letter is L).
Thanks
I wonder about CHAT. A possibility is CHAW, a mouthful (of tobacco) = capacity and an alternative spelling of chew as in chew the cud = talk about. The only other suggestion I have is CRAN, something to do with the capacity of a barrel for fish. Don’t know what the talk about connection is unless cran about is narc as in coppers, but I the spelling should be nark.
Regards,
Ian