Surrealist pursues vehicle, with small to medium destruction (9)
I believe the answer is:
vandalism
'destruction' is the definition.
(I know that vandalism is a type of destruction)
'surrealist pursues vehicle with small to medium' is the wordplay.
'surrealist' becomes 'dali' (Salvador Dali).
'pursues' means one lot of letters go next to another.
'vehicle' becomes 'van' (type of vehicle).
'with small' becomes 's' (abbreviation - e.g. clothes size. I am not sure about the 'with' bit.).
'to medium' becomes 'm' (as in UK clothing sizes).
'dali' put after 'van' is 'vandali'.
'vandali'+'s'+'m'='VANDALISM'
Can you help me to learn more?
(Other definitions for vandalism that I've seen before include "barbarous treatment" , "property crime" , "Wilful destruction" , "Defacement" , "Wanton destruction" .)