Seventh heaven (7)

I think it could be either:

ecstasy

nirvana

'seventh heaven' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for ecstasy that I've seen before include "State of elated bliss" , "Overwhelming joy" , "State of perfect bliss" , "Modern drug associated with dance raves" , "Youth drug or unalloyed bliss" .)

I've seen this clue in The Guardian, The New York Times and The Wall Street Journal.

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