23a. Toothsome vegetables - but only grown for show
SWEET PEA
4d. It was once used to make one smart top or bottom
HAIRBRUSH
I think I get this parse...was a hairbrush traditionally used to smack a naughty child's bottom? Says something about the setter, if that's it.
1a. The last but one round house
SEMI
9a. Ruling on leader of Tory tabloid is disastrous
TRAGIC
Parses for the above please.