Drive out farm vehicles capsized in Oise (9)
I believe the answer is:
ostracise
'drive out' is the definition.
(I've seen this before)
'farm vehicles capsized in oise' is the wordplay.
'farm vehicles' becomes 'carts' (cart is a kind of vehicle. I am not sure about the 'farm' bit.).
'capsized' says the letters should be written backwards.
'in' indicates putting letters inside.
'carts' back-to-front is 'strac'.
'strac' placed inside 'oise' is 'OSTRACISE'.
Can you help me to learn more?
(Other definitions for ostracise that I've seen before include "Drive out" , "Cast out, send to Coventry" , "cut off" , "Socrates and I are made to exclude from society" , "Banish from group" .)