Not doing well on this.
17A - a small piece of soap (7) I have E???OE
20A - listening to an excerpt from Tennyson's Maud, I entirely lost track of time (7) I have ????E?T
14D - dramatist's Lady of the Lake apparently had one who (admired ?) her (10) I have ?????R?E?E
20D - a tenacious sounding emperors son-in-law (7) I have ????P?A