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Walgraver, I gather the online clue for 19a was"Frank director who discovered it's a wondrful life, but you can't take it with you", which obviously is Capra. The printed version had "Thicket said to be associated with thieves in thrillers", which is indeed copse, but if the online version is right Capra does fit with Morte D'Arthur.
Baldric, it could be Honored rather than Hundred, but other than it's an American spelling I don't see how that relates to the clue either.