Crossword puzzle clue "they're often called out in alphabetical order in a roll call"

They're often called out in alphabetical order in a roll call

Vowels, in alphabetical order

Somewhat suspect (and a hint to what can be found by connecting the circled letters in alphabetical order)

Alphabetical order?

Only 20th-century president whose three distinct initials are in alphabetical order

Alphabetical order?

Shape formed by connecting the circled letters in alphabetical order, plus one more connection back to A

Word reference that can list material in non-alphabetical order