callback
n.— «He ends nearly every chapter with a surprising figurative twist on something he said earlier, like what comedians refer to as a “callback.”» —“Inventing English: A Portable History Of The Language By Seth Lerer” by James Campbell Martin Bookslut Feb., 2008. (source: Double-Tongued Dictionary)
Further reading
In 1916, a small-town newspaper in Pennsylvania printed a fanciful item about a local gathering with a guest list that included, among others, Miss Ella Vader, Mr. Ray Zor, and other punny names. This is part of a complete episode. Transcript of...
While reading Great Expectations (Bookshop|Amazon) by Charles Dickens, a listener in Arlington, Texas, is surprised when one of the characters inherits some money, which Dickens describes as a cool four thousand. Were they really using cool that way...