Solitary responsibility welcomed by Europeans (7)
I believe the answer is:
eremite
'solitary' is the definition.
(I've seen this before)
'responsibility welcomed by europeans' is the wordplay.
'responsibility' becomes 'remit' (I can't justify this - if you can you should believe this answer much more).
'welcomed by' is an insertion indicator (letters welcomed inside).
'europeans' becomes 'ee' (an abbreviation for European written twice).
'remit' put into 'ee' is 'EREMITE'.
Can you help me to learn more?
(Other definitions for eremite that I've seen before include "Solitary" , "ascetic" , "Religious person" , "desert father" , "Christian living in severe circumstances" .)