European in much anxiety (4)
I believe the answer is:
fear
'anxiety' is the definition.
(I know that fear is a type of anxiety)
'european in much' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'in' is an insertion indicator.
'much' becomes 'far' (I've seen this in other clues).
'e' inserted into 'far' is 'FEAR'.
(Other definitions for fear that I've seen before include "Feeling of dread" , "Trepidation" , "Dread, alarm" , "Consternation" , "Alarm, reverence" .)