What may help car to restoration of power (3,4)

I believe the answer is:

tow rope

'what may help car' is the definition.
(a tow rope might be used to tow a car)

'to restoration of power' is the wordplay.
'restoration of' indicates an anagram (the order of letters restored or reset).
'power' is an anagram of 'wrope'.
'to'+'wrope'='TOW-ROPE'

(Another definition for tow rope that I've seen is " cable".)

I've seen this clue in The Guardian.

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