European tortured rat in USA (8)
I believe the answer is:
austrian
'european' is the definition.
(I know that Austrian is a type of european)
'tortured rat in usa' is the wordplay.
'tortured' indicates an anagram (I've seen this in other clues).
'rat'+'in'+'usa'='ratinusa'
'ratinusa' is an anagram of 'AUSTRIAN'.
(Other definitions for austrian that I've seen before include "Like Mozart" , "Hot spicy pod" , "person from Europe" , "Nationality of citizen of Vienna" , "Eg, native of Vienna" .)