10 across: Kind of book detailing marital aid (5)
TH and I erred on this one, going for sexpo more in hope than anything else rather than dredging up from the boondocks of my ephemera-retaining memory the sexto that is the answer. And this baby gets a golden guernsey basically because of my prurience: marital aid = sextoy so that detailing marital aid = sexto = kind of book.
DA should be thankful I am prurient, though, otherwise the other clue I have esteemed worthy of golden status (it’s a teaching to boot!) would have been the only.
Do we expect too much of DA?