Cobain's band in heaven (7)

I believe the answer is:

nirvana

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'heaven' is the definition.
(I know that heaven can be written as nirvana)

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for nirvana that I've seen before include "US rock band" , "Ultimate tranquil state" , "Transcendent state of Buddhists" , "Eastern place of complete bliss" , "Buddhist version of Paradise" .)

I've seen this clue in The Sun.

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