Jet excursion stopped by rain (10)

I believe the answer is:

outpouring

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'jet' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Maybe there's an association between them I don't understand?

'excursion stopped by rain' is the wordplay.
'excursion' becomes 'outing' (synonyms).
'stopped by' indicates putting letters inside (I've seen this in other clues).
'rain' becomes 'pour' (pouring is a kind of raining).
'outing' going around 'pour' is 'OUTPOURING'.

Can you help me to learn more?

(Another definition for outpouring that I've seen is " Passionate and voluble utterance".)

I've seen this clue in The Independent.

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