Some gas pedal used: went like rocket (4)
I believe the answer is:
sped
'went like rocket' is the definition.
'sped' can be an answer for 'went' (speeding is a kind of going). I'm unsure of the 'like rocket' bit.
'some gas pedal used' is the wordplay.
'some' indicates a hidden word (some of the parts of the word are used).
'SPED' is hidden within 'gas pedal used'.
Can you help me to learn more?
(Other definitions for sped that I've seen before include "Rushed" , "Raced, hurried" , "Dashed" , "Hastened" , "Went fast" .)