Lateteens

5 clues
Age range for many college frosh
Nancy Drew never left hers behind
College enrollment time, generally
Age category of most college entrants
Age range for most first-year college students

Similar answers:

Ablate
Ablated
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Acidulate
Adulate
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Agarplate
Agerelated
Airborneparticulates
Alate
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Alittlelater