Namibia's neighbor, for short

Fourth month, for short3 Letters before an alternate name3 North ___, northernmost point on Earth4 Actress ___ Hayworth of "Gilda"4 Attire or costume (anagram of "brag")4 Stringed and fretted orchestral instrument with "Electric" and "Acoustic" variants6 "Don't ___, don't tell"3 British actor Roger ___ of "Cheers" and "The West Wing" (anagram of "seer")4