Juiceup

1 clue
Supercharge, and a hint to what's literally hiding in the four longest Down answers
Similar answers:
Aceuponessleeve
Aloejuice
Applejuice
Babycarrotjuice
Beetlejuice
Braceup
Bugjuice
Carrotjuice
Chanceupon
Clamjuice
Creativejuices
Denverjuice
Deuceupe
Faceup
Faceupto
Faceupwards
Forceupon
Fruitjuice
Fruitjuicedrink
Fruitjuicejelly