Idiot Des vandalised unusual things (8)
I believe the answer is:
oddities
'unusual things' is the definition.
(odd things or phenomena)
'idiot des vandalised' is the wordplay.
'vandalised' indicates anagramming the letters.
'idiot'+'des'='idiotdes'
'idiotdes' is an anagram of 'ODDITIES'.
(Other definitions for oddities that I've seen before include "Rum folk" , "So tidied up for strange people or things" , "Eccentric things or people" , "geeks" , "Unusual persons or things" .)