Some help with the following,please! Thanks in advance!
18 ACROSS: Scottish landowner set out to protect river (5) S???D 28 ACROSS: Stagger while on duty, shattered, with yen to be off (7): A????N? 7DOWN :Stop mother making garland ( 6 ): ??U?M? 23DOWN: Annoy trustee, deceitfu, missing date (7)- ?R?U??? 29 DOWN: Quiet insects rising around one's head(6)- ??T??M