@verso,
50d - dig deep, Warren! 6 letters and looks like ?a?r?w BURROW(?)
59d - project to last the distance 5 & 3 - looks like ????? out STICK OUT
62a - Milne character allowed after
private
investigator
applied third de
gree - 6 letters - 4th letter L
PIGLET
54d - goes round in women's clothing - 6 letters - l???t? SKIRTS (?)