Somewhat contrarily, Gehenna is in Utopian country (7)
I believe the answer is:
tunisia
'country' is the definition.
(I know that Tunisia is a country)
'somewhat contrarily gehenna is in utopian' is the wordplay.
'contrarily' is a reversal indicator (letters in the opposite or contrary direction).
'somewhat' indicates the answer is hidden within the clue.
'aisinut' can be found hidden inside 'gehenna is in utopian'.
'aisinut' in reverse letter order is 'TUNISIA'.
(Other definitions for tunisia that I've seen before include "Country between Algeria/Libya" , "North African republic" , "Republic in northwestern Africa" , "Country in North Africa" , "Country which contains the site of Carthage" .)