Crossword puzzle clue "a bird may have one"

"You may have the universe if I may have ___" (Verdi opera line)

A bird may have one

A sub may or may not have one planned

Bird that Byrd may have seen

Actor who said "Some people have youth, some have beauty—I have menace"

Sounds you might make when I say "Would you rather watch your parents have sex or have your parents watch you have sex?"

One may have only one big part

Trump that may or may not have a face