Historical clue formulations

• Something that guarantees you'll come out on top? — 2023-02-25
• "Use it or lose it" sloganeer — 2018-03-24
• Producer of a hair-raising experience? — 2014-08-30
• Hair-raising stuff? — 2011-06-11
• Increaser of one's growth potential? — 1997-05-01