Wanton damage made by truck to dismal building (9)
I believe the answer is:
vandalism
'wanton damage' is the definition.
(I've seen this before)
'truck to dismal building' is the wordplay.
'truck' becomes 'van' (van is a kind of truck).
'building' indicates an anagram.
'dismal' with letters rearranged gives 'dalism'.
'van'+'dalism'='VANDALISM'
'made by' is the link.
(Other definitions for vandalism that I've seen before include "barbarous treatment" , "property crime" , "Graffiti artist's work" , "Wilful destruction" , "Deliberate destruction" .)