Hi, Rusty!
Yes, it was "Strath" of which I was thinking...yet another Scottish reference from Mr. R!
I, too, have "talcum" for 13a.
I didn't really give it much thought, Rusty?
Talc is a very soft clay mineral of magnesium silicate.
I assumed that the bath reference was to soaking in the tub, and using "talc" to absorb moisture, afterwards.
(I don't know if it's used nowadays.........we all go for adding moisture, rather than removing it!)
I didn't think of it as being a Geographical reference (as to Bath)?
I just stuck the answer in, quite happily!
I may be wrong........
That is good to hear about the V & A.
That is one museum here, to which I have never been.
I should rectify the omission.