Hello, Elle!
Mrs Ricci is English, sorry, not American like her husband!.
They live near Sevenoaks. (Not so far from you?)
Now, Elle, you have mentioned being a Latin student before, so I thought you would see "id est"!
I don't speak Latin, but it looked very familiar!
Chambers tells me it is Latin for "that is/that is to say".
If you put "L" for litres in it, it becomes "idlest"/"least likely to work".
Yes, there are tougher clues. You should have nailed this one!
In 28a I have "estate".
I am thinking Virginia is on the eastern side of USA and it is a state.
Is that what you reckon?
Well, I used to do the Guardian puzzle.
To me, some puzzles were super, and some were much less so.
But, others may well think differently.