I fled around European ruin (6)
I believe the answer is:
defile
'ruin' is the definition.
(thesaurus)
'i fled around european' is the wordplay.
'around' indicates an anagram.
'european' becomes 'e' (abbreviation e.g. EU).
'i'+'fled'='ifled'
'ifled' is an anagram of 'defil'.
'defil'+'e'='DEFILE'
(Other definitions for defile that I've seen before include "Desecrate" , "Contaminate" , "dishonour?" , "Foul - pass" , "Pollute in ravine?" .)