Heard to exhale in frustration — vital for spirit? (6)

I believe the answer is:

psyche

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'for spirit?' is the definition.
(psyche is a kind of spirit)

I can't explain the rest of the clue.

(Other definitions for psyche that I've seen before include "The soul, spirit or mind" , "Human soul - Cupid's beloved" , "Sole and spirit" , "Princess beloved by Cupid" , "Immaterial part of a person" .)

I've seen this clue in The Independent.

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