Energetic person wants motor racing to update for new image (9)
I believe the answer is:
firebrand
'energetic person' is the definition.
'motor racing to update for new image' is the wordplay.
'motor racing' becomes 'fi' (FI resembles F1, Formula 1).
'to update for new image' becomes 'rebrand'.
'fi'+'rebrand'='FIREBRAND'
'wants' acts as a link.
(Other definitions for firebrand that I've seen before include "One who stirs up trouble" , "Agitator" , "Energetic person often fomenting trouble" , "Rabble-rouser" , "Troublemaker" .)