That’s not the definition. Wikipedia says (emphasis mine)

Clickbait, a form of false advertisement, uses hyperlink text or a thumbnail link that is designed to attract attention and to entice users to follow that link and read, view, or listen to the linked piece of online content, with a defining characteristic of being deceptive, typically sensationalized or misleading.[2][3]

What you are taking about is a teaser.

A “teaser” aims to exploit the “curiosity gap”, providing just enough information to make readers of news websites curious, but not enough to satisfy their curiosity without clicking through to the linked content.