Adult in despair perhaps finds Eden (8)
I believe the answer is:
paradise
'eden' is the definition.
(I know that eden can be written as paradise)
'adult in despair perhaps' is the wordplay.
'adult' becomes 'a' (abbreviation).
'in' is an insertion indicator.
'perhaps' indicates anagramming the letters.
'despair' is an anagram of 'pardise'.
'a' put within 'pardise' is 'PARADISE'.
'finds' acts as a link.
(Other definitions for paradise that I've seen before include "Garden of Eden" , "park" , "Elysian fields" , "perfectly happy state" , "Heaven, nirvana, Valhalla etc" .)