Nirvana cover recorded in urinal oddly (6)
I believe the answer is:
utopia
'nirvana' is the definition.
'cover recorded in urinal oddly' is the wordplay.
'cover' becomes 'top' (topping is a kind of covering).
'recorded in' is an insertion indicator.
'oddly' means one should take alternating letters.
The alternating letters of 'urinal' are 'uia'.
'top' placed into 'uia' is 'UTOPIA'.
(Other definitions for utopia that I've seen before include "Imaginary ideal place" , "Idealised place" , "Thomas More's favourite place" , "Imagined state of perfection" , "Perfect state of things" .)