17a. expansive
79a. Lauren Laverne (who she? I found her on Google)
65d. lovesick
36a. I think this must be "love nest" but I can't see the word play ?
36a agree 'Love Nest' being a separate property for a couple to meet in private, usually to play mummies and daddies. After hastily removing one another's clothing they would soon be 'down to their last stitch'. Radiator recommended . . . .