Definition from Wiktionary, the free dictionary
lead-in (plural lead-ins)
- An introduction; something that leads into the beginning of something.
- After the long lead-in, the climax of the story was a disappointment.
- A region of data at the beginning of a compact disc, holding the table of contents.
- (journalism) A short phrase that begins the caption of a photograph.
- (phrase at start of caption): kicker