Underage

3 clues
Too young
Deficiency
____ Minor
Similar answers:
Aaverage
Aaverages
Abeverage
Abounded
Aboverage
Abovetheaverage
Actyourage
Airrage
Allrounder
Alltherage
Allunderoneroof
Aloeveragel
Aluminumbeveragecan
Americantragedy
Amperage
Anchorage
Anchoragealaska
Anchorages
Androidrage
Anoutrage