WordNet
opening line
n. the first line of a piece of writing (as a newspaper story)
Usage examples of "opening line".
He had given his opening line some thought, and delivered it as soon as his target was in range.
It was so complicated a situation that she couldn't even think, but had to, as they passed soaring ceilings and windows in the ornate old structure that was littered with impressive antiques and every modern convenience imaginable, working on an opening line.