Tesla showed its weird van (7)
I believe the answer is:
transit
'van' is the definition.
(Ford Transit van)
'tesla showed its weird' is the wordplay.
'tesla' becomes 'T' (scientific unit).
'showed' becomes 'ran' (I've seen this in another clue).
'weird' indicates an anagram.
'its' is an anagram of 'sit'.
't'+'ran'+'sit'='TRANSIT'
(Other definitions for transit that I've seen before include "Passage of a planet across the sun's disc" , "Passage of heavenly body" , "In - - (en route)" , "The process of going or conveying" , "Change" .)