Refuge admitting European is delightful place (6)
I believe the answer is:
heaven
'delightful place' is the definition.
'heaven' can be an answer for 'place' (I have seen 'Place of bliss' mean 'heaven' so perhaps 'place' could also mean 'heaven'). I'm unsure of the 'delightful' bit.
'refuge admitting european' is the wordplay.
'refuge' becomes 'haven' (I've seen this in another clue).
'admitting' is an insertion indicator (admit can mean to welcome in or accept).
'european' becomes 'E' (abbreviation e.g. EU).
'haven' enclosing 'e' is 'HEAVEN'.
'is' acts as a link.
Can you help me to learn more?
(Other definitions for heaven that I've seen before include "Sky - paradise" , "Place of supreme bliss" , "ecstasy" , "Realm of eternal bliss" , "Nirvana, paradise" .)