Answer: souped

AnswerCrossword Clue
SOUPED

Made more powerful, with "up"

SOUPED

Converted into a hot rod (with "up)".

SOUPED

Fed with liquid food.

SOUPED
Supercharged (with "up").
SOUPED
Supercharged (with "up"): Slang.
SOUPED...-up, as a hot rod
SOUPED... up (like some jalopies)
SOUPEDAdded power with up
SOUPEDAdded power to a car (with "up")
SOUPEDJuiced (up)