European place of refuge, a heavenly place (4)
I believe the answer is:
eden
'a heavenly place' is the definition.
(I've seen this in another clue)
'european place of refuge' is the wordplay.
'european' becomes 'E' (abbreviation e.g. EU).
'place of refuge' becomes 'den'.
'e'+'den'='EDEN'
(Other definitions for eden that I've seen before include "Delightful place" , "Genesis location" , "Our leader once" , "The primal garden" , "Place of complete bliss" .)