Drive back in revolutionary Tesla taxi (5)
I believe the answer is:
rebut
'drive back' is the definition.
(I've seen this before)
'revolutionary tesla taxi' is the wordplay.
'revolutionary' is a reversal indicator (letters revolve around).
'tesla' becomes 'T' (scientific unit).
'taxi' becomes 'uber'.
't'+'uber'='tuber'
'tuber' in reverse letter order is 'REBUT'.
'in' acts as a link.
(Other definitions for rebut that I've seen before include "Confute" , "Rebuff; deny" , "Brute (anag)" , "show as bad" , "Check" .)