European associated with tricky space flight (6)
I believe the answer is:
escape
'flight' is the definition.
(flight can mean an escape)
'european associated with tricky space' is the wordplay.
'european' becomes 'e' (abbreviation e.g. EU).
'associated with' says to put letters next to each other.
'tricky' indicates an anagram.
'space' anagrammed gives 'scape'.
'e'+'scape'='ESCAPE'
(Other definitions for escape that I've seen before include "Break loose, get away" , "Break loose - flight" , "Manage to avoid" , "'Break free, get away (6)'" , "Run away from confinement" .)