Need help with the following clues please.
11A: Such hullabaloo when the sheep gave birth in another form bizarrely B???A? (6)
18A: One to raise eyebrows or set tongues wagging as old Westerns depicted ? ??R???E? I? T?W? (1-8-2-4)
1D: Impeccable - as nobody is ??????? ??N (7-3)
Thanks in advance.