Answer: xyz

AnswerCrossword Clue
XYZ

The last three

XYZ

... Affair (1790s incident that worsened Franco-American relations)

XYZ

... Affair (diplomatic incident during John Adams's presidency)

XYZ
Ending string
XYZ
Series ending
XYZClosing sequence
XYZ... Affair: 1798-1800 France-USA dispute
XYZVW followers
XYZ... Affair (1797-8 incident involving the U.S. and France)
XYZGrade school recital's finale
XYZString after W
XYZEnd of a well-known series
XYZSeries finale
XYZWell-known series finale
XYZAcronym that suggests one's fly is undone
XYZClosing letters
XYZThe ".... Affair"
XYZThe .. Affair of 1797-98
XYZClosing trio
XYZAlphabet enders
XYZAlphabetic trio
XYZUltimate letters
XYZLast letters
XYZThumb-index tab, perhaps
XYZ... Affair (18th-century historical incident)
XYZ"Your fly is open"
XYZThey come last
XYZ... Affair
XYZAlgebraic symbols.
XYZHistoric affair of 1797-98.
XYZRelative of ABC.
XYZFamous papers
XYZAffair of 1797
XYZThe ... Affair in 1797
XYZAlphabetic sequence
XYZFinal trio
XYZThe ... Affair: 1797
XYZTalleyrand's "Affair"
XYZThe ..... Affair
XYZ..... Affair