Divert first of two vehicles I had turned round (8)
I believe the answer is:
distract
'divert' is the definition.
(distracting is a kind of diverting)
'first of two vehicles i had turned round' is the wordplay.
'first of' suggests taking the first letters.
'vehicles' becomes 'carts' (cart is a kind of vehicle**).
'i had' becomes 'id' (I'd).
'turned round' says the letters should be written in reverse.
The initial letter of 'two' is 't'.
't'+'carts'+'id'='tcartsid'
'tcartsid' backwards is 'DISTRACT'.
(Other definitions for distract that I've seen before include "Subject to diversion" , "Confuse" , "Side track" , "Puzzle" , "Draw someone's attention away from something" .)