Delightful state is unknown in obstinate bloke, on reflection (7)
I believe the answer is:
elysium
But I can't explain it at all! Could you help me understand?
(Other definitions for elysium that I've seen before include "Greek abode of the blessed dead" , "(In Greek mythology) the dwelling place of the blessed after death" , "Slimy EU (anag.)" , "Delightful place" , "Paradise of Greek myth for heroes and virtuous people" .)