Relocate car, pounding pedal (11)

I believe the answer is:

accelerator

I'm a little stuck... Click here to teach me more about this clue!

'pedal' is the definition.
(I know that accelerator is a type of pedal)

'relocate car pounding' is the wordplay.
'relocate car' anagrams to 'ACCELERATOR'.
But, I am unsure how this is indicated.

Can you help me to learn more?

(Other definitions for accelerator that I've seen before include "Throttle" , "Pedal controlling vehicle's speed" , "Driver's foot pedal" , "Right-hand car pedal" , "Substance speeding up a chemical process" .)

I've seen this clue in The Mirror.

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